Can't send mail - all recipients were rejected

hstoellinger

Hello,
For a while I have been getting the following error message:

user@siteX (SMTP)
Can't send mail - all recipients were rejected

Is there a way to find the faulty message?
Thanks for helping.

yojimbo274064400

If this issue is occurring when not sending an email review unsent message in All Messages > Outbox for possible cause

edwardp

There is a similar thread, with the same subject: