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How to block bounced addresses with your suppression list.

Sending to an address that already bounced is the fastest way to damage your reputation. MailEnv keeps a suppression list for you, so bounced addresses are blocked without any code on your side.

5 steps 4 min read

01A bounce suppresses the address automatically

When Amazon SES reports a bounce, MailEnv:

  1. Marks the message as bounced in your email logs, with the bounce type and reason.
  2. Changes the recipient's subscriber status to invalid.
  3. Sends you a dashboard notification naming the address and the reason.

There's nothing to set up. This runs on every account, for every send.

02Future sends are blocked before they reach SES

Once an address is invalid, MailEnv refuses any new send to it with a 403. The request never reaches Amazon SES, so it can't bounce again or add to your bounce rate.

Handle the 403 in your code by logging it and moving on. Don't retry: the address won't become sendable on its own.

03Check suppressed addresses

Open Subscribers and look at the Invalid count. Search for a specific address to see its status.

Open notifications from the bell icon to see recent bounces with their reasons. Email Logs shows each message's final status: delivery, bounce, complaint, or reject.

04Watch complaints too

When someone marks your email as spam, the message shows a complaint status in your email logs. Complaints hurt your reputation even faster than bounces: Amazon SES starts a review at a 0.1% complaint rate.

If you see complaints, stop emailing that person, and check that everyone on the list really asked for your mail.

05Keep bad addresses out from the start

The suppression list catches problems after they happen. Verification stops them before they happen: new addresses are checked before the first send. Learn how to clean your list.

FAQ

Common questions

Stuck on a step? Talk to an engineer.

Is this the same as a blacklist?

Yes. In email, "blacklist," "blocklist," and "suppression list" all mean addresses you must never send to. MailEnv builds yours automatically from bounces.

Can I remove an address from the suppression list?

Not from the dashboard. If an address was suppressed by mistake, for example because the recipient's mailbox was full and it's working again, contact us and we'll take a look.

Does a soft bounce suppress the address?

MailEnv treats a bounce reported by SES as a reason to stop sending. If you think an address was suppressed because of a temporary problem, contact us.

Why does this matter for Amazon SES?

SES puts accounts under review at a 5% bounce rate and may pause sending at 10%. Suppression keeps repeat bounces from ever counting toward that number.

Ready to send?

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