Bogdan Enache: > I restarted Postfix and flushed the queue a few times, but there isn't > any change. It's always trying "notes.uptel.net", never any of the other > 2 MXs.
The Postfix client tries a limited number of IP addresses and a limited number of SMTP sessions. Number of IP addresses, default: smtp_mx_address_limit = 5. Number of SMTP sessions, default: smtp_mx_session_limit = 2. Wietse