Soft-Bounce
- Doesn't effect the reputation
- Some factors of why this happens:
- receiver has a full e-mail box
- out of office
- e-mail is too large
- server is down or offline
- This is serious and can hurt the smtp reputation
- Some factors of why this happens:
- invalid e-mail address
- non-existent e-mail
- blocked e-mail
When sending through mailister, check bouces e-mail folder. System is setup to auto detect bounces. Check to make sure. Other checks can be made by looking at logs through rspamd or /var/log/mail.log using tail -f /var/log/mail.log