Rejection
Your bounce classification is a bit rubbish
When a mailbox provider rejects or defers an email it sends back a message explaining why.
Read MoreNew Deliverability Resource
The nice folks over at Postmark shared a new deliverability resource last week. The SMTP Field Manual. This is a collection of SMTP responses they’ve seen in the wild. This is a useful resource. They’re also collecting responses from other senders, meaning we can crowdsource a useful resource for email deliverability folks.
Read MoreIncorrect rejection messages
At least one ESP and Spamhaus are currently investigating bounce messages at a couple ISPs incorrectly pointing to Spamhaus as the reason for the block. The bounce messages are taking the form:
Read More