Email blocklist monitoring
Don’t let small setbacks cause major disruptions to your email program. Stay off blocklists, avoid spam traps, monitor your domain and IP reputation, and more with Mailgun Optimize.
Blocklist monitoring
If your domains or IPs end up on an email blocklist, your entire email program could come to a screeching halt. Protect your domains, IP addresses, and sender reputation with Mailgun Optimize’s comprehensive blocklist monitoring. Take swift action, minimize disruptions to your email deliverability, and maintain a strong sender reputation.
By continuously scanning your sending infrastructure against a curated list of high-impact blocklist providers like Spamhaus, SpamCop, Barracuda, and CBL, you’re promptly alerted if your IP or domain becomes listed.
Spam trap monitoring
Sending to spam traps will quickly diminish your sender reputation and eventually land you on a blocklist if you don’t take action. It’s one of the fastest and easiest ways to do serious damage to your email deliverability.
Our built-in email blacklist check and blocklist monitoring give you real-time gives you real-time insights into how often you’re hitting pristine, recycled, and typo spam traps, and alerts you the moment your domains or IPs appear on any major blocklist. Identify and resolve issues fast to protect your sender reputation and keep your email program running smoothly.
Google Postmaster Tools and Microsoft SNDS
As your domain and IP reputations diminish, so does your ability to get important email to the inbox of your subscribers. Your reputation is one of the single most important factors in whether you land in the inbox or the spam folder.
Mailgun Optimize has direct integrations with Google Postmaster Tools and Microsoft SNDS so you can monitor domain and IP reputation, spam and blocklist results, delivery errors, and more from directly within the app.
Bounce Classification
Don’t let bounce rates diminish your reputation and ruin deliverability – monitor your bounces and filter by mailbox provider, spam filter, and bounce category.
Bounce Classification works by identifying the bounces that result from your actions as a sender. This eliminates most soft bounces that might register due to temporary issues like network interruptions, and focuses on the bounces that impact your deliverability the most like bounces from policy violations, low reputation, and blocklisting. This feature is only available for senders using Mailgun as their email service provider.
Email health score
With the myriads of factors that affect your sender reputation, getting a grasp of overall deliverability is challenging. Understand and remedy the issues affecting your email program with Mailgun’s email health score.
Our email health score provides a snapshot of your overall deliverability for easier monitoring and remediation of issues based on the five most critical email deliverability signals: bounces, complaints, spam traps, full inboxes, and hard failures. With these factors visualized in one single view, you’re able to identify sending issues in less time than ever before.
EMAIL REPUTATION
Every time you send an email, ISPs like Gmail or Microsoft monitor your sending practices and assign a reputation to your domain and IP address. This reputation is based on several factors from spam complaints, to sending volume and everything in between. If your reputation diminishes, your emails are more likely to land in the spam folder, making your sender reputation a pivotal factor in determining the success of your email program.
No one wants to be on a blocklist, especially a business running email marketing campaigns. An email blocklist is a list of IP addresses and domain names flagged as sources of suspicious behavior, malicious content, and spam messages.
Regular blocklist checks are crucial. If your company’s mail server ends up on an email blocklist or your emails hit a spam trap, your marketing efforts could quickly bleed red ink. Once blocklist service providers flag your IP address or domain as potential spam, inbox providers may refuse to deliver your messages to subscribers’ inboxes.
Wondering how you ended up on a blocklist? Check out five common reasons why:
Landing on a blocklist can be very scary. Your email program suddenly stops working and you have potentially millions of emails no longer reaching your subscribers. With our Deliverability Services you can get access to professional resources that will help you assess the situation, work with the blocklist providers, and get back on track as fast as possible.
The best course of action is preventative action! Check out our list of best practices so you can avoid landing on an email blocklist:
So, how do you tell whether your IP address or domain name has popped up on an email blocklist? Perform a blocklist check. This check will determine whether your IP address or domain name has landed in a blocklist database. If you discover your IP address or domain name is on a public or private email blocklist, it could damage your entire email marketing campaign. Showing up on a blocklist affects whether email servers will allow your company’s emails to be sent to recipients or not.
Various tools are available to conduct blocklist checks. While your ISP should signal whether any of your IP addresses or domain names are on any email blocklists, things sometimes slip through the cracks. For instance, your email marketing messages could have mistakenly been marked as spam messages. That’s why it’s smart to use a blocklist monitoring tool to see whether your company has shown up on a blocklist. If the tool comes across your IP address or domain name, you can act quickly to remove your information blocklists.
FAQ
Blocklist monitoring is a continuous service that watches your IP addresses and domains against multiple blocklist providers and alerts you the moment you appear on any of them. An email blocklist check is a one-off query you perform to see if your IP or domain currently exists on a blocklist database. Monitoring gives you proactive, ongoing protection; a check gives you a snapshot at a single point in time.
It is best practice to perform an email blocklist check at least daily. High-volume senders may even opt for hourly checks. This frequency ensures you catch new listings quickly and minimize downtime or deliverability impacts.
Mailgun Optimize’s blocklist monitoring covers all major public blocklist providers, including Spamhaus, SpamCop, Barracuda, CBL, and several regional and private lists. You get comprehensive visibility across the blocklists most likely to affect your deliverability.
While no tool can prevent blocklist listings entirely, proactive monitoring lets you detect early warning signs, like spikes in spam complaints or misconfigured authentications, and remediate issues (e.g., tightening mailing list hygiene) before they lead to a blocklist event.
By identifying blocklist listings immediately, an email blocklist check enables you to rapidly address the root cause, like removing problematic recipients or fixing authentication failures, so inbox providers see you as trustworthy. Faster remediation directly translates into higher inbox placement and lower bounce rates.
