LIVE: Sparkloop Integration

LIVE: Sparkloop Integration

We are pleased to announce that BigMailer customers can now grow and monetize their newsletters with SparkLoop, the #1 newsletter recommendations platform, using a direct integration.

What Can Sparkloop Do?

SparkLoop Partner
Sparkloop allows you to grow your lists and monetize via recommendations and you have many options to choose from.

  • Grow your list by partnering with other relevant newsletters and promote each other
  • Allow your subscribers to use their referral list to promote you and offer incentives
  • Monetize by offering paid recommendations to your new subscribers
  • Add paid recommendations directly into your newsletters
  • Get your newsletter promoted by others, and only pay for engaged subscribers that meet your criteria.

How Do I Get Started?

The first step is to create your account with SparkLoop here, then connect to BigMailer using an API key and Brand ID.

Connect to BigMailer

You will need to create a new API key to use for this integration and select what actions are allowed. Select options to create/update/upsert Contacts, list/get/create/update Lists, list/get Brands, and list/get/create/update Fields (this one is only needed if you plan to run a referral program for your subscribers).

BigMailer API key permissions

You can copy your brand ID by going to your brand settings page, you will see the ID in red text at the top of the page, below the brand name.

Choose Your Program

SparkLoop offers you a few options to grow and monetize your newsletter.

Grow Your List

You have 3 options to grow your subscriber list:

  1. Run a Referral Program, or
  2. Partner with another newsletter for free recommendations (via Upscribe)
  3. Get your newsletter promoted by others. 

Grow list with Sparkloop

If you decide to run a referral program make sure your API key allows managing your fields, because your entire list will get updated so each subscriber can have their unique referral code stored.

Monetize Your List

You have 2 monetization options:

  1. Show paid recommendations to new subscribers via Upscribe feature
  2. Add paid recommendation links into your newsletters

Monetize with SparkLoop

We would love to hear about your success with SparkLoop, so please reach out and share. We may even feature you on one of our landing pages or emails.

Happy email marketing!


Now Live: Email Validations

Now Live: Email Validations

Email Verification with BigMailer

Feb 12, 2024 – Email Verification is LIVE

We are excited to announce that BigMailer customers can now verify their email lists during the import step, saving time and money on using 3rd party tools outside BigMailer that cost x2-3 more than BigMailer verification service.

How Does Email Verification Work?

During the import step, BigMailer users that have Administrator role will be given an option to verify the list they are importing, and automatically remove all invalid emails from the imported list. The invalid emails will be available for download as part of the error file that is shown on the Import page now, with appropriate validation result.

There are 2 options for automatic removal of emails from your imported list:

  1. Remove Undeliverable emails only – this option removes emails that can’t receive email.
  2. Remove Undeliverable and Risky emails – invalid emails, plus emails that are likely to hard of soft bounce.
  3. Remove Undeliverable, Risky, and Unknown emails – same as option above, plus unknown emails. Unknown emails are likely to soft-bounce for a variety of reasons: a) mailbox full b) email server is temporarily unavailable c) email server returns an error.

Risky and unknown emails can bounce at 30% or higher rate and engage at very low rates, so it’s up to you to decide if you want to keep them on your list or prefer to not take a risk.

If you don’t want to miss out on any subscribers but want to protect your sender reputation, you can initially chose option 2 or 3 above, then download the error file and filter out risky and unknown emails to re-import them without verification into a separate list. You can then “pepper in” some of the risky emails slowly into your email activity over a period of time to validate through sending. Avoid using Risky on your 1st campaign with a new provider, to prevent damage to your sender reputation and negative impact on your future inboxing.

Email Verification Results

Once you confirm verification options, BigMailer will import your list without the emails you chose to not import. The verification speed is very fast and will not cause you any major delays with importing your lists. Some example verification speed times:

  • ,<5,000 emails – under 1 min
  • 50,000 emails – under 10 min

The confirmation page will redirect you to the import archive page where all your import jobs and statuses are shown.

On the results page you will see a link to your error file. The most common result codes you would see in your error file, after an import is complete (with or without validation), are listed below. Only the last three are a result of verification with credits used. Invalid and duplicate emails don’t use validation credits.

Result Code Description
INVALID_EMAIL The column value is not a syntactically valid email address.
EMAIL_TOO_LONG The email is more than 100 characters.
DUPLICATE_EMAIL The email address was already encountered and imported from a previous row in the CSV file.
TOO_MANY_FIELDS The row had too many fields (more than 100).
FIELD_TOO_LONG The row had has a column value that is too long (more than 255 characters).
EMAIL_UNDELIVERABLE The email address is undeliverable.
EMAIL_RISKY The email address is risky and likely to bounce.
EMAIL_UNKNOWN The status of the email is unknown and likely to bounce.


Cost of Email Verification

Email verification rate at the time of this announcement is $1.5 per 1k contacts and credits can be purchased in increments of 5k with a 10k minimum. Any unused credits will remain as a balance on your account. Volume discounts are available for purchasing 100k, 300k, 500k, and 1M validation credits. Please reach out to support via live chat to buy credits with a volume discount.

We are offering extra 10% discount on all bulk credit purchases before June 1, 2024.

Credits Discount Cost
Up to 99,000 $1.5 per 1000 emails
100,000-299,999 10% + 10% before June 1 $1.2 per 1000 emails
300,000-499,999 20% + 10% before June 1 $1.05 per 1000 emails
500,000-999,999 30% + 10% before June 1 $0.90 per 1000 emails
1M+ 40% + 10% before June 1 $0.75 per 1000 emails


There are 2 payment options – use existing credit balance or buy more credits. Customers with Administrator role (only) can buy credits from their Billing page, under the Pre-Paid credits tab.

How Accurate Is BigMailer Validation?

BigMailer is using a combination of internal data and established 3rd party services for verifying your email list. While many providers will tell you their accuracy is 97-99% we think these type of claims are misleading. Not all emails can be verified, so the accuracy will depend on your list age and diversity of email domains, e.g. what % of your list is Yahoo for example. The older your list, and the more addresses you have,  the more invalid emails you will have. This is because providers like Yahoo (and very recently Gmail) suspend email accounts for inactivity, so those email addresses are still valid but not able to receive emails.

Bottom line, verifying with BigMailer will never result in high enough bounce rates to cause any issues with your sender reputation. If your list is older, consider removing both risky and unknown email addresses to lower your bounce rates.

Most senders will still have hard/soft bounces on their campaigns after using ANY email verification provider. But as long as your hard bounce rate is below 2%, which may indicate a natural list decay, your sender reputation and future inboxing will not suffer from low bounce rate.

Most email lists decay at 1-3% per month with B2B lists having a faster decay rates due to job switches. So if you have not sent to your email list for more than 1-2 months you should always re-verify it to keep hard bounce rates low.

Email Verification and Deliverability

List quality is only one of many factors influencing your deliverability. Typical email verification can help you remove invalid emails, but most providers are unable to identify spam traps you may have collected over the years. Spam traps are typically hiding in your inactives segment, so sending less frequently to inactives and having a sunset policy in place can help.

Please review our article on advanced deliverability tactics and implement as many strategies listed as possible, for best deliverability and inboxing. Need help with deliverability issues? Request your account audit via our chat support.

February 2024 sender guidelines from Google and Yahoo

February 2024 sender guidelines from Google and Yahoo

Google and Yahoo announced that some of the sender guidelines are going in effect in February of 2024. What does it mean for you? If you are a bulk sender, sending more than 5000 emails per day (and that’s 99% of BigMailer customers), then you need to make sure you adhere to the new guidelines if you want to inbox with Gmail and Yahoo.

Let’s go over the most notable guidelines:

  1. SPF, DKIM, and DMARC records on a sender domain are needed. You can use this tool to check your sender configuration. And here is an article on how to add DMARC record.
  2. You will need to be mindful of your complaint rates for Gmail (keep below 0.3%), which are not reported in BigMailer because Gmail doesn’t provide a feedback loop to mailbox providers. The only way to check your complaint rates in Gmail is with Google Postmaster tool. Setup an account and start monitoring if you haven’t already done so.
  3. 1-click unsubscribe is the most debated recommendations by everyone in the industry. Many marketers think this means when someone clicks on an unsubscribe link in the email they should be instantly unsubscribed, but that’s not what it actually means. The actual unsubscribe links in the email body can’t be 1-click, like the list-unsubscribe header can. This is because some organizations use security bot scans and may auto open and auto-click links, which would result in erroneous and unintentional unsubscribe actions. However, the unsubscribe action should be 1-click AFTER a subscriber clicks on the link in the email – no login walls, no extra feedback required before the unsubscribe action. BigMailer now automatically includes the list-unsubscribe header, but Gmail may not always show the list-unsubscribe header to prevent abuse by spammers. Here is a Google support answer that explains this.
  4. Use a clear sender identity – don’t impersonate another brand and don’t use a misleading From label. Your sender From label and email should match the branding used in the email body. Using different From labels for the same email address is an example of a bad practice that can get you in trouble with mailbox providers.
  5. Adhere to US CAN-SPAM law (no misleading subject lines, mailing address in the footer, must include unsubscribe link).
  6. Have a policy for dealing with inactive subscribers. You don’t have to delete them (a sunset policy), but you should reduce your sending frequency to inactive subscribers to continue inboxing. Remember, inactive segment is where a lot of the spam traps are hiding and sending to spam traps can damage your sender reputation.

What is an inactive subscriber? The definition of inactive would depends on your sending frequency. If you send daily, then inactive subscriber is someone who hasn’t opened any of your emails in more than 2 weeks (think a typical vacation). However, we would recommend to exclude anyone who hasn’t opened in 5-6 days from your daily schedule, to ensure inboxing. Just send to your inactives weekly instead. If your segments are setup correctly, your inactives become actives as soon as they open any of your emails with no additional work from you.

Looking to improve your deliverability and inboxing? Consider sending less frequently to your inactives. Here is an article on advanced deliverability and inboxing tips that describes tactics for managing inactive subscribers.

FAQ: Is my account automatically compliant if I use BigMailer?

If you are sending with BigMailer, you already have a DKIM record in place and list-unsubscribe headers are added automatically. If you are using SES to send emails in BigMailer, you can check if your sender has SPF and DKIM records by going to your SES page (Account link in the header > SES in the menu) and click on a region name if you use more than one.

Use MX Toolbox tool to check your DNS records once they are added – if you don’t see them they may have been added in a wrong place/provider.

Still have questions about your account readiness? Log into your BigMailer account and reach out via live chat.

Happy email marketing!

Upcoming Pricing Changes

Upcoming Pricing Changes

Announcement Date: Nov 20, 2023

Summary of the November 2023 updates

#1. We are removing unlimited sending on Business, Agency, and Enterprise plans that require Amazon SES connection and replacing it with a monthly sending limit of x12 list size (approx. 3 emails per week to entire list). Sending above the monthly limit is subject to overage fee of $0.4 per 1000 emails sent.

#2. Delivery stats and Sent/Delivery notifications via webhook are subject to additional fees:

  • Sent notifications via webhook – $20 per 100,000 contacts per month
  • Delivery stats – $40 per 100,000 contacts per month

#3. We increased the starting billing level for Business plan to $20/month from $10/month. Existing active customers are not affected, as long as they keep their accounts in good standing. If a subscription gets canceled due to past due billing status it has to re-activate with all new pricing changes in affect.

Our pricing page and billing pages were already updated and the changes are in immediate effect for new customers only. These changes will be in effect for existing customers on their billing period that starts on or after January 1st 2024.

Frequently Asked Questions

I only send 2-3 emails per week to my entire list, will my cost change?

No, if you send 3 times per week or less frequently there is no monthly/total cost change.

I am sending daily or more than once a day, can I get a discount on overage fees? 

If you are not storing a lot of images on BigMailer platform, or willing to switch to hosting images elsewhere (your store or website) you can request a custom volume discount. Please reach out via chat to discuss.

Do you offer volume discounts?

Not on plans that require use of Amazon SES, unless the sending is very infrequent (once a month or less often) and you are on Agency or Enterprise plans. We do have more flexibility with custom discounts for customers on our Pro (x10 monthly limit) and Premium (x30 monthly limit) plans that don’t require Amazon SES connection.

Would it cost me more to switch to send with BigMailer instead of Amazon SES?

It depends on your sending frequency. If you send x10 per month than the cost between Basic and Pro plans is comparable, almost identical. If you need to send daily, then switching to our Premium plan can save you money on the overages. Business/Agency Premium plans comes with x30 monthly limit and don’t require Amazon SES connection. The overage for sending above limit is still $0.4 per 1000 emails.

Are there more pricing changes coming?

We commit to not raising prices for the same plan/product for at least 12 months after a price change. We have never changed pricing for Business plan before, since we launched in 2017. We might add custom data storage policies to all plans sometime in early 2024, but it will likely affect less than 10% of our customers.

Is there any way to lock into my current pricing?

You can lock your current price by switching from a monthly plan to an annual plan that also comes with a 15% discount.

Still have questions? Reach out to us via chat (once logged in) to discuss your account and current/future cost.

Dedicated IP for Email Marketing – Do You Need It?

Dedicated IP for Email Marketing – Do You Need It?

If you work with email marketing campaigns you no doubt heard about dedicated IP (internet protocol) addresses. Perhaps you have been wondering about who uses them and if you should use one yourself. In this article, we explain what they are for and who should use them.

What is an IP?

IP (internet protocol) address is a unique address that identifies a device (computer or server) on the Internet or a local network. When you start using a hosted transactional or bulk email marketing service, by default, your emails are being sent from a group of servers with different IP addresses, and that group of servers is shared by multiple senders like you. So your emails go out from a “shared IP pool” and the reputation of those shared IP addresses is shared as well. The IP reputation is one of the factors that influences email deliverability and inbox placement.

IP Reputation as an Email Deliverability Factor

Lets make one thing clear – deliverability is not the same thing as inbox placement – an email in Spam folder is considered to be delivered. A lot of ESPs (email service providers) claim to have high deliverability, but that just means they can avoid delivery blocking by ISPs based on volume of emails sent from a single server/IP. High delivery rate is nice, but you still need to place into subscriber’s inbox, which is much harder than getting your email delivered.

Most ESPs are responsible for managing (and protecting) the reputation of the IP addresses used by their platform. For that reason, many ESPs turn away customers if/when they determine that their use of the platform may negatively affect other customers. Some platforms (like Mailchimp) scan the email lists customers upload to automatically determine its quality and can suspend account or campaigns based on that data. Many providers have a manual account or campaign review step for all new customers, so it’s not even possible to send a bulk campaign as soon as you sign up. This type of customer filtering and platform protection by market leaders results in 2 things:

  1. Desired customer pool with high quality senders and good email sending practices
  2. Higher prices for the service, in return for better IP reputation

So when you use a market leader like MailChimp or CampaignMonitor, that cost up to x10 more than some of the lower cost providers, you pay for “good company” in addition to extra features (e.g. multivariate testing, email template variety, direct integrations).

Does it mean that low cost email providers have lower quality IP pools than market leaders? No, if they are large enough they have many IP pools and likely sender quality tiers. Will your emails go to Spam folder if you use a cheap provider? It’s more likely, but not if all other email deliverability factors signal quality and you are placed into an IP pool with other good senders. ESPs have a way of ranking senders and grouping similar senders into appropriate IP pools. It’s a typical practice they don’t typically disclose to their customers, or everyone would ask to be on a better IP pool.

Email Deliverability Factors

Lets review the factors that affect deliverability, they are:

  1. IP reputation
  2. Sender reputation (e.g. sender being your domain or exact email address the emails are sent from)
  3. Server and domain configuration (DKIM, SPF, tracking links, etc)
  4. Global engagement
  5. Content and format of the email (spam words in subject or message body, format – use of images, etc)
  6. Relative engagement for you (sender) versus other senders in the recipients inbox
email deliverability factors

Email deliverability factors

On the diagram above, the green box represents factors that vary and change more with each campaign sent and the square on the left with 4 factors are not subject to dramatic changes on a per campaign basis. So with IP address reputation being only 1 of several factors, it can be a deciding factor in inbox placement but it depends on the quality score of the other factors as well.

Who Benefits from a Dedicated IP?

If you are a sender with established good reputation and high engagement history, and especially if you are sending low volumes of emails (less than 10,000 per day), you have a low risk of being affected by a switch of an ESP from a market leader to a lower cost provider. However, getting a dedicated IP address can help ensure your ongoing high deliverability in the future, as your list grows and mailbox providers adjust their inbox placement algorithms.

If you are a high volume sender (send more than 50,000 emails per day) and perhaps have been experiencing deliverability issues with your current provider, switching ESP might not give you an instant improvement unless you change some of the factors as well – improve list quality by removing invalid or inactive addresses, properly configure your domain for sending emails (have DKIM in place), invest in testing your email content and optimal send times.

You can benefit from a dedicated IP address IF:

  • You are looking for a fresh start and looking to invest in building a strong email sender reputation with full control.
  • You have a small list now, but plan to grow it fast and monetize it
  • You have built up a sizable list (over 50,000 subscribers) and willing to invest in best practices and control your IP quality.
  • You are an agency offering email marketing services to your clients.

Unfortunately, low volume senders are limited in their options because most ESPs don’t offer an option to get a dedicated IP address on lower pricing tiers. And if you use an ESP that does offer access to a dedicated IP, it may come with a hefty price tag. If you use an ESP that runs on Amazon SES, like BigMailer, you can request a dedicated IP(s) from Amazon anytime, at a cost of $25 per IP per month. Check out our comparison of bulk email marketing services to see how different providers accommodate use of dedicated IP addresses.

How Many IPs Do You Need?

The need for IPs is determined by your list size and your practices. Most providers recommend 1 dedicated IP for every 50,000 (Amazon) to 100,000 emails you plan to send to at the same time (in a single campaign).


  1. If your list size is 50,000 and you send newsletters to entire list you need 1-2 IP addresses
  2. If your list size is 1,000,000 but you typically send to a segment of about 200,000 you need 2-4 IPs
  3. If you are an agency with clients sending at different times, your IP needs need to cover the largest campaign you send at any given time. So you may have a dozen or more customers with millions of subscribers in total, but only need 2-3 IPs for all your clients.

Warmup Process – IPs and Senders

The warmup process applies to both new IPs and new sender domains. Most ESPs have automatic IP warming in place, and not something you need to worry about, but you should confirm this before a switch. During an automatic IP warmup your dedicated IP would be sending small number of emails with the rest of the volume being sent from a shared pool. It can take anywhere from 1 month to 6 months to warmup your IP address(es) to send 100% of your emails, depending on sending frequency.

When starting to use a new sender domain you need to warm it up by sending smaller volumes at the start and gradually increasing it. Typically, you would start sending to your most active or recently signed up subscribers to ensure good engagement and to help establish your sender domain reputation.

Example warmup schedule:

  • Day 1 – 500 emails
  • Day 2 – 800 emails
  • Day 3 – 1100 emails
  • Day 4 – 1500 emails

If your email list is very diverse and your list is large, because you are trying to move your existing activity to a new sender domain, you can start with 2000-3000 emails per day and add about 25-40% per campaign (smaller increments for daily campaigns and larger increments for x2/week or weekly campaigns. Typically, it’s better to send more frequently with smaller volume increments, but it requires a bit more effort from the sender.

There are many providers that can help you warmup your new sender domain, like WarmupInbox that is meant for warming up new sender domains, or InboxAlly that can also help improve your engagement and deliverability. What those providers do is give you a seed list (or just send on your behalf) of email addresses they control to interact with your emails, to help establish your sender reputation.

Final Thoughts

Have you recently switched ESP and experienced a big change in inbox placement? Share your experience with us via live chat. If you are a BigMailer customer we would love to use your story for a case study.

Happy email marketing!