015.009

Mailbox & Recipient-Level Errors

The "port is full" bounce. This section covers soft bounces that are the recipient's fault, not yours. The most common is Mailbox full, which is a temporary error.

11 questions in this topic

What is “over quota”? What’s “disabled mailbox”? What’s “inactive account”? What is “spam folder full”? What happens when a mailbox is temporarily suspended? How long before ISPs deactivate idle inboxes? What is a “vacation response” vs “temporary bounce”? How can spam filters reject before mailbox creation? What are “alias rejections”? How do forwarding rules cause false bounces? What happens when an email is rejected by an intermediary filter?