Yes, I have noticed that too from at least emea01-am1-obe.outbound.protection.outlook.com EUR01-DB5-obe.outbound.protection.outlook.com
It seems the customers sending the emails are always the same. I am also using exim. On 05/02/16 14:56, Arkadiusz Miśkiewicz wrote:
Hi.
Did anyone notice DKIM issues (mails failing signature verification or body
hash not matching) with mails coming from these servers?
emea01-db3-obe.outbound.protection.outlook.com
emea01-am1-obe.outbound.protection.outlook.com
EUR01-DB5-obe.outbound.protection.outlook.com
EUR01-HE1-obe.outbound.protection.outlook.com
EUR01-VE1-obe.outbound.protection.outlook.com
Most of messages coming from these servers validate properly but some fail
verification (I have over 1k of failed copies).
Now that can be bug on microsoft side or on my side (exim MTA).
If verification fails I'm early saving a raw copy of the message. Tools like
dkimverify.pl (perl Mail-DKIM) or dkimverify.py (python-dkim) confirm that
saved messages do not pass dkim checking (that still leaves some room for a
bug in exim between smtp session and saving a raw copy but it's unlikely).
Thanks,
smime.p7s
Description: S/MIME Cryptographic Signature
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