K2MailerAdministrators
Process bounces and spam complaints
Connect bounce and feedback-loop mailboxes or provider callbacks so bad recipients stop receiving mail.
In the app→Setup → Bounces / Feedback Loops
Mailbox handlers
Bounce handlers read delivery-failure notices from an IMAP or POP mailbox. Feedback-loop handlers read ISP spam-complaint notices from a dedicated mailbox.
- Host, username, password, port
- Mailbox connection credentials.
- Method and encryption
- IMAP or POP access with the required SSL/TLS behavior.
- Validate certificate
- Controls mailbox TLS certificate validation.
- Delete after processing
- Removes handled notices from the mailbox.
Alternative provider callbacks
Mailgun, SendGrid, MailJet, Elastic Email, SendinBlue, and Amazon SES can send delivery reports directly to K2Mailer callback routes. This reduces reliance on parsing mailbox notices.
Was this guide enough?
Contact support if your screen or result is different.