Automatic pauses and reviews

If more than 5% of recent emails bounce, or more than 0.3% are marked as spam, sending pauses automatically. Those are the limits Gmail and Yahoo hold senders to.

1. Read the banner: it says whether it was bounces, spam reports or a review.
2. Clean your list with email checking.
3. Reply to the email we sent you and we'll look at it.

Nothing is lost while paused; queued emails wait. Links through URL shorteners or to bare IP addresses are refused because spam filters block them.