Bad Addresses

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reinob
Posts: 935
Joined: 2014-06-30 11:42

Re: Bad Addresses

#21 Post by reinob »

KitchM wrote:Okay, still not working. I received this report:
Reporting-MTA: dns; w1.tutanota.de
X-Postfix-Queue-ID: 8E64AFA03E9
X-Postfix-Sender: rfc822; kitchm@tutanota.com
Arrival-Date: Tue, 26 May 2020 18:30:16 +0000 (UTC)

Final-Recipient: rfc822; admin@forums.debian.net
Original-Recipient: rfc822;admin@forums.debian.net
Action: failed
Status: 4.1.7
Remote-MTA: dns; tartini.debian.net
Diagnostic-Code: smtp; 450 4.1.7 <kitchm@tutanota.com>: Sender address
rejected: unverified address: host mail.tutanota.de[81.3.6.165] said: 450
4.7.1 Client host rejected: cannot find your reverse hostname,
[217.196.43.138] (in reply to RCPT TO command)


I believe that I had verified my address when I signed up, so this makes no sense.
That error has nothing to do with you, but with your e-mail provider (tutanota.de).
mail.tutanota.de resolves to 81.3.6.162 and 81.3.6.165, but 81.3.6.162 reverse-resolves to w1.tutanota.de and 81.3.6.165 to w4.tutanota.de.

That should be mostly OK, but some mail servers really require that IP <-> hostname resolve OK in both directions, as an anti-spam measure.

So you'd have to (1) contact the server admins per e-mail to tell them to relax those restrictions (which are way out of date and cause more problems than they solve), so that you can (2) contact the server admins per e-mail to.. oh wait :)

(OK you can do (1) with another e-mail address..)

KitchM
Posts: 124
Joined: 2019-06-11 18:11

Re: Bad Addresses

#22 Post by KitchM »

Thanks for the feedback. I have sent the last information to Tutanota to see if they can figure anything out about it. I'll keep you posted.

reinob
Posts: 935
Joined: 2014-06-30 11:42

Re: Bad Addresses

#23 Post by reinob »

KitchM wrote:Thanks for the feedback. I have sent the last information to Tutanota to see if they can figure anything out about it. I'll keep you posted.
Hmm.. I think what I wrote is not quite right. From what you posted:

Code: Select all

Diagnostic-Code: smtp; 450 4.1.7 <kitchm@tutanota.com>: Sender address
rejected: unverified address: host mail.tutanota.de[81.3.6.165] said: 450
4.7.1 Client host rejected: cannot find your reverse hostname,
[217.196.43.138] (in reply to RCPT TO command)
It appears that there are two errors being mixed into one. The first one "450 4.1.7" says that your address wasn't verified, but it is not clear whether that's tutanota speaking (when you submitted the message) or debian (during the delivery attempt). The second one (450 4.7.1) is tutanota complaining about debian's server (forums.debian.net is 217.196.43.138 but 217.196.43.138 doesn't resolve back to forums.debian.net).

I have the feeling that what you posted was not copied/pasted correctly, as the two error messages come from different places. Could you confirm that?

KitchM
Posts: 124
Joined: 2019-06-11 18:11

Re: Bad Addresses

#24 Post by KitchM »

Here's the response from Tutanota:
the problem is that the reverse dns entry is missing for 217.196.43.138. The maintainers of that mail server need to setup the reverse dns entry.
It is about what I thought. A simple setting that the admins failed to set. If that is correct, it is a bit of a rookie mistake.

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