Client was not authenticated

HCL Domino Domino Forum
1

Hi!

I have a problem when sending SMTP mails but only to some external domains. I get Delivery Failure Message that says:

Error transferring to mail.domainname.COM; SMTP Protocol Returned a Permanent Error 530 5.7.1 Client was not authenticated

I guess it has something to do with SMTP authentication on our Domain server, so can someone please give me an advice what to do?

Thanks in advance.

Sanela

2

Subject: Client was not authenticated

I’m getting this error message as well. Did you do anything to resolve it?