Ben Rosengart:
> If, upstream, I separate the recipients into different transports,
> will this cause the upstream Postfix to "split the envelope" and send
> the mail in >1 transaction, even though both transports are implemented
> with smtp(8) and the nexthop is the same?
Each transport in a (transport, nexthop, recipient) triple has its
own per-nexthop message delivery request queues, and each message
delivery request has its own mail delivery transaction.
However, due to connection caching, multiple transactions from
different transports(!) may share an SMTP session.
Wietse
