Hi,

Smtp2Go relay service enforces a few rules for deliverability:

The From: address domain has to be verified in smtp2go The sender envelope address also has to be verified in smtp2go

So emails sent by mailman don't get relayed because mailman sets From: to be the original sender of the message, and it means anyone that wants to send to the list would have to approve themselves with smtp2go first, which is not workable.

To make it work, I would have to have something like:

Sender: bounce-address@lists.mailman3.org - untouched From: original.sender@gmail.com@lists.mailman3.org - change #1 having the From address to be From the list Reply-To: original.sender@gmail.com - change #2 - if someone replies

Then smtp2go will send the email.

I looked in the settings and I didn't find a readily available option to do that.

I'm new to customizing mailman3 , but have been using it in production for a little more than 1 year.

I've seen other software do the solution proposed above, namely DIvi contact forms set the "From" to be something @website.com and the Reply-To: as the form submitter.

I am told that the standards is moving away from forging the DATA From: that doesn't have a predictable domain, and instead put the variable email address in Reply-To, for things like contact forms or automated sending.

Can someone guide me on where I could start looking?