Replies bounce back - "553 relay error"

[Guest]

All of a sudden, all of my replies bounce back with a message from "System Administrator" saying that "recipients can't be reached. 553 relay error." I have option to resend, but I get same error. I can directly send to anyone without a problem, and this only occurs with a reply. I use two different SMTP outgoing mail accounts and the problem occurs with both.

Any suggestions?

Thanks,
Tom

 

[Jocelyn Fiorello [MVP - Outlook]]

You need to turn on authentication to your outgoing server. You can do so
on the "Outgoing Server" tab for your mail account.

--
Jocelyn Fiorello
MVP - Outlook

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