Wietse Venema: > Bryan Arenal: > > I'm working on moving from PMTA over to Postfix and had a question on > > relaying for virtual domains. We send mail on customers' behalf and > > one of the things I'm trying to figure out is how to implement PMTA's > > "virtual-mta" in Postfix. This defines the destination host and > > credentials for the relaying. For example each of these would be > > their own respective config file: > > Would the following help: > > sender_dependent_relayhost_maps > per-sender relayhost via the default SMTP client > > smtp_sender_dependent_authentication > per-sender SASL login information > > And for really special cases: > > sender_dependent_default_transport_maps > per-sender delivery agent and relay host, > allows custom SMTP client settings. > > Each has some text at > https://www.postfix.org/postconf.5.html#name-of-parameter > > That's all Postfix has to offer.
Oh, and while this looks like you need multiple lookup tables, the above can be implemented with a single *SQL database table. Just set up the right queries on the Postfix side. > Postfix does not virtualize delivery status notification messages. > If mail can't be delivered then the user will receive a message that > comes from the hostname in main.cf:mydestination, not from a virtual > MTA. > > Wietse > > > <virtual-mta smtp.office365.com-39-95002> > > <domain *> > > route smtp.office365.com:587 > > auth-username "USERNAME" > > auth-password "PASSWORD" > > use-starttls yes > > </domain> > > </virtual-mta> > > > > <virtual-mta smtp.gmail.com-935-93737> > > <domain *> > > route smtp.gmail.com:587 > > auth-username "USERNAME" > > auth-password "PASSWORD" > > use-starttls yes > > </domain> > > </virtual-mta> > > > > We have a lot of these; one per customer. Is this possible to do in > > Postfix? > > > > Thanks! > > >
