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

nog.ch<mailto: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 h

[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 : Helo command rejected: From this posting, although a bit dated: https://www.mail-archive.com/swinog@lists.swinog.ch/msg06676.html