Hi,

I am using SMTP outbound relay and email store/forward services.

I have a Synology NAS setup using Synology Mailplus server.

I am able to receive email sent from my personal gmail account to my personal domain account but unable to send from personal domain account to gmail account.

Done DKIM, and every step that needs to be done.

Appreciate if you can help.

Thanks!

Updates:

I tested it with yahoo mail instead of gmail and it works.

Seems like there gmail is blocking it.

Anyone have ideas on how to resolve this?

Thanks!

You can open a support ticket and ask them to check if SPF and DKIM are set up correctly. Google requires SPF or DKIM (one of them) to be able to send emails to Gmail users.