Why Your Email Service Provider Suspended You (and How to Fix It)

If your ESP has suspended or restricted sending, the issue is often bigger than one bad campaign. It usually points to a workflow that let poor-quality data reach the send step.

Common reasons ESPs intervene

• bounce rate is too high
• complaint rate is too high
• list sourcing looks risky
• the send pattern suggests poor hygiene

What to do first

Stop sending from the problem segment and review the list itself.

That means checking:

• where the contacts came from
• how old the data is
• whether the file was cleaned before sending

How MailCull fits the recovery workflow

MailCull can help with the cleanup step:

1. export the affected audience or segment
2. run it through Verify List
3. remove undeliverable rows
4. review risky rows carefully
5. rebuild from a cleaner file instead of retrying the old one

The bigger lesson

Suspensions are often the result of hygiene debt finally becoming visible.

Fixing the list will not solve everything, but it is usually one of the first places to start.

Use MailCull to review the list before the next send attempt →