Le 29/06/2026 à 08:25, Tobi via mailop a écrit :
n the last days we're seeing that Microsoft is using
"forms.mail.microsoft" as envelope SMTP sender-domain. As this domain
does neither have A or MX it's considered unresolvable by our postfix
MTA. Anyone else seeing that domain in their mailflow?
Any chance that MS will see that and fix it? :_)
Hi
I can see an MX
$ dig +noall +answer +stats forms.mail.microsoft MX
forms.mail.microsoft. 247 IN MX 0
sponaeop.mail.protection.outlook.com.
;; Query time: 0 msec
;; SERVER: 134.246.166.14#53(134.246.166.14)
;; WHEN: lun. juin 29 09:07:45 CEST 2026
;; MSG SIZE rcvd: 101
$ dig +noall +answer +stats sponaeop.mail.protection.outlook.com.
sponaeop.mail.protection.outlook.com. 10 IN A 52.101.9.17
sponaeop.mail.protection.outlook.com. 10 IN A 52.101.10.12
sponaeop.mail.protection.outlook.com. 10 IN A 52.101.10.18
sponaeop.mail.protection.outlook.com. 10 IN A 52.101.41.6
;; Query time: 86 msec
;; SERVER: 134.246.166.14#53(134.246.166.14)
;; WHEN: lun. juin 29 09:08:01 CEST 2026
;; MSG SIZE rcvd: 188
--
Grégory Rocher
_______________________________________________
mailop mailing list
[email protected]
https://list.mailop.org/listinfo/mailop
