How to use Gsuite Relay as SMTP for CiviCRM bulk mailing?

Question

I have Gsuite email setup with our own domain ([email protected]). I have tried to use mailgun with gsuite. Although it worked ok ish, as the number of contact increasing, bills are also increasing.

Since there is Gsuite relay service available which allows 10000 emails per day, we would like to setup our CiviCRM with it, so we can use it's full potential.

I have read this post How to use G Suite / GMail as your CiviMail Provider but not able to get SMTP working at all from civicrm's side.

We are currently using cpanel hosting and SMTP mailserver already setup on there which allows only 250 emails. Not very efficient and not sure if that causing any issue while setting up gsuite relay.

Did you manage to successfully setup Gsuite and currently using without any issue? If yes, would you please share some thoughts or tips what issue you have encountered and how you have solved it?

EDIT: I have tried to follow the steps as per the instruction on above tutorial and getting this results. I have tried different combination of ports and authentication settings on Gsuite, but no luck. I am using the email with our domain for signin [email protected], and app specific Password to set the SMTP

Answer 1

Its been a while - but hope these tips help:

• Make sure you greenlight the IP address of your server for smtp relay.
• Sometimes your webhost will block outgoing smtp ports to servers other than their own. Ask your host to remove this limitation, if they do not, find another host. This is common with shared hosting.
• There are issues with Gsuite smtp relat long term - see this article - it has been suspended - but good to keep in mind. https://gsuiteupdates.googleblog.com/2019/12/less-secure-apps-oauth-google-username-password-incorrect.html

Answer 2

It seems there is a difference between sending via Gsuite and Gsuite SMTP Relay ...

For sending via Gsuite, and comparing the connection details in the post you linked to with a site using this, the difference is that it uses SMTP host ssl://smtp.gmail.com

The main practical limitations are the limits and that all mails get sent out with the sender of the Gsuite account, not the address you configure in Civi.

I haven't tried Gsuite SMTP Relay