[Users] WG: [Bug 3252] smtp authentication at smtp server of GMX fails - permanent error - no sending

[Pierre Fortin]

On Thu, 21 Aug 2014 20:29:20 +0100 Juergen Gaida wrote:

>The result is always the same: 553 Authentication credentials invalid.

Have you checked the less obvious?  Maybe a space or TAB or other
whitespace in the userid or password fields? Or a typo?

Sometimes the server is really telling you where to focus...

I can connect to mail.gmx.net at various ports (see below); but I don't
have an account....

Note that port 465 does not identify itself as an ESMTP server...

HTH,
Pierre


$ telnet mail.gmx.net 25
Trying 212.227.17.190...
Connected to mail.gmx.net.
Escape character is '^]'.
220 gmx.com (mrgmx002) Nemesis ESMTP Service ready
quit
221 gmx.com Service closing transmission channel
Connection closed by foreign host.

$ telnet mail.gmx.net 465
Trying 212.227.17.168...
Connected to mail.gmx.net.
Escape character is '^]'.
quit

Connection closed by foreign host.

$ telnet mail.gmx.net 587
Trying 212.227.17.190...
Connected to mail.gmx.net.
Escape character is '^]'.
220 gmx.com (mrgmx001) Nemesis ESMTP Service ready
quit
221 gmx.com Service closing transmission channel
Connection closed by foreign host.