EMail issue in ojs user is unable to send email

I am facing the issue that email is not diliver from the ojs the error email will recive on the user email
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its

recipients. This is a permanent error. The following address(es) failed:

host []

SMTP error from remote mail server after end of data:

550-5.7.26 Unauthenticated email from is not accepted due to domain’s

550-5.7.26 DMARC policy. Please contact the administrator of domain

550-5.7.26 if this was a legitimate mail. To learn about the DMARC initiative,

550-5.7.26 go to

550 5.7.26 Control unauthenticated mail from your domain - Google Workspace Admin Help z8-20020a5d44c8000000b003368cffe113si2963885wrr.168 - gsmtp

Hi @Ahmad_Abdullah,

Could you please specify which version of OJS you are using (e.g. 3.3.0-11). Please include this information in your posts as it is important for troubleshooting.

PKP Team

I am using version of ojs