Hi @JHE,
When you use the Gmail SMTP service, it forces the sender to the owner of the Gmail account; there’s unfortunately nothing you can do about that, as it’s under Google’s control.
More broadly, if you’re having trouble sending email with other SMTP servers, then you’re probably running into DMARC delivery issues. This is a standard that’s become widely used to prevent email spoofing. We’ve added improved support for DMARC-compliant emails in recent releases of OJS, and you might find some of the discussions of this useful in understanding what you can and can’t do without running afoul of DMARC compliance checks. See e.g. this thread: Unauthenticated email is not accepted due to domain's DMARC policy
In general, the newer the release of OJS you’re running, the less trouble you’ll have with it. (We’re due to release OJS 3.1.2-1 this week, in case you’re considering upgrading.)
Regards,
Alec Smecher
Public Knowledge Project Team