Mail discarded when subject is empty

[edvanleeuwen]

I have noticed that when mail is sent which contains an empty subject, the mail is discarded (domain_filter). Furthermore, I see an entry "ESF score is 30 / 1000". If I am correct, this means that there is a soft fail on SPF.

Does anyone know why this causes a soft fail? Or am I interpreting the values not correctly?

 

[zEitEr]

Hello,

ESF is Easy Spam Fighter and yes it gives 30 spam scores to an email on SPF SOFT FAIL. Usually it means: sender host address is not allowed to send mail from sender address domain. For more information you'd better check exim logs.

 

[edvanleeuwen]

Thanks for your reply. I have narrowed it down to this scenario:
- Windows 10 Mail
- Mailserver entered as sending with SSL and verification username/password
- No subject entered

If I do enter a subject, the message is delivered properly.