OMP Emails to gmail-Recipient blocked


we use OMP 3.3.0-7.
When OMP tries to send an Email to a, this Email was blocked from the recipient with
----- The following addresses had permanent fatal errors ----- (reason: 550-5.7.26 This message fails to pass SPF checks for an SPF record with a hard)
Emails to other Email-provider are successful.

Have someone a tip/idea what we can do that also Emails to gmail are successfully sent?

Thx in advance!

Hi @decker,

Fairly certain that other users have reported this before. You might want to search here on the forum and look at similar posts where users have encountered this issue (and have reported on how they have resolved it). We also have some guidance in our documentation that might help:

PKP Team

Hi Roger,

thank you for your hint.

I have changed the Email-settings in the


And at the first glance, it works as requested.

Regards Constanze