Re: [swinog] UPC outbound relay - HELO hostname not in DNS. Can someone at UPC fix this?

Hi Rainer

I can confirm the same thing here. But UPC did not contact me off-list until now...

Let’s see if we can skip the exception for them soon...

Regards, Beat

Von: Rainer Duffnermailto:rainer@ultra-secure.de Gesendet: Tuesday, 1 February 2022 14:29 An: swinog@lists.swinog.chmailto:swinog@lists.swinog.ch Betreff: [swinog] UPC outbound relay - HELO hostname not in DNS. Can someone at UPC fix this?

Hi,

our mailserver rejects mails from servers that don’t send a resolvable HELO-hostname.

As such, customers have been complaining about UPC:

450 4.7.1 <vie01a-dmta-ch01.mx.upcmail.nethttp://vie01a-dmta-ch01.mx.upcmail.net>: Helo command rejected:

From this posting, although a bit dated:

https://www.mail-archive.com/swinog@lists.swinog.ch/msg06676.html

it looks as if there is some sort of typo or it was simply forgotten to update DNS.

Can someone fix this?

Rainer

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