i had my MFP working just fine, untill one day i suddenly started to get 016-764 SMTP connection failed.
I hadn't changed my mail server, it just suddenly started. I know there is no problem with net connection, because i can access the printer through the net.
I tried using other servers, but with no change. it is like the printer can be accessed through the office network, but can't connect to anything outwards.
please help.