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"​

thank you
regards

Marco