On 2020-01-28 17:24, Marco Kälin wrote:

Hi list,

Someone from Quickline mx ord dns team here?

You send VPBX Fax2Mail Messages from faxserver@business.quickline.ch. Can you please check your spf record on business.quickline.ch?

root@localhost:~# dig @8.8.8.8 business.quickline.ch txt +short "v=spf1 -all"​

That record indicates it domain should not be sending mail, which likely is intended.

business.quickline.ch is a bit of an odd domain though, as most of the 'enterprise' stuff has been bumped to Tineo.

Please send the full headers and other details if any to jeroen.massar@qlgroup.ch and I'll have a peek at it and/or pass it to the right folks who should be handling it.

Greets, Jeroen

PS: since end of December most Quickline domains (especially the domains hosted on the mailplatform) have proper SPF/DKIM/DMARC records, thus spoofed or forwarded mails will nicely have to be dropped.