Good Day,

I work for a legit marketing company. We send out email of be-halve of our clients (so it appears the mail came from their servers and email system).
We are using sendmail for this at the moment, but I would like to migrate to Zimbra if possible?

The requirements are as follows:

we send out email as user@localzimbraserver via zimbra and goes to the subcribeduser@hisrealemaildomain.com but appearing as coming from marketing@clientdomain.com with a return path to the zimbra server in case the mail bounces (email address is fake or no longer exists)

Is this possible?

If unclear something like sendgrid?