Forum Discussion

Charles-André Bélanger's avatar
Oct 09, 2023

SPF problem on valid domain name

Hello,

 

We are starting to have problems (Received-SPF fail) since a few days on some email, here a example from a valid email that was cut by O365 and put in the quarantine.

This email was generated by us via Adobe electronic signature and the error is:

 

Received-SPF: Fail (protection.outlook.com: domain of mail.na4.adobesign.com

does not designate 104.47.75.169 as permitted sender)

 

after digging a bit, I realise that this IP is an IP from Microsoft, it's a bit strange that O365 is blocking an email from one of it's own IP address ?

 

I'm not sure where to start to investigate this problem

 

any advise will be helpfull

thanks

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