MCONNECT(1)MCONNECT(1)NAMEmconnect - connect to SMTP mail server socket
SYNOPSISmconnect [-p port] [-r] [hostname]
The mconnect utility opens a connection to the mail server on a given
host, so that it can be tested independently of all other mail soft‐
ware. If no host is given, the connection is made to the local host.
Servers expect to speak the Simple Mail Transfer Protocol (SMTP) on
this connection. Exit by typing the quit command. Typing EOF sends an
end of file to the server. An interrupt closes the connection immedi‐
ately and exits.
The following options are supported:
Specify the port number instead of the default SMTP port
(number 25) as the next argument.
Raw mode: disable the default line buffering and input han‐
dling. This produces an effect similar to telnet(1) to port
The following operand is supported:
The name of a given host.
The mconnect command is IPv6-enabled. See ip6(7P).
Help file for SMTP commands
SEE ALSOtelnet(1), sendmail(1M), attributes(5), ip6(7P)
Postel, Jonathan B., RFC 821, Simple Mail Transfer Protocol, Informa‐
tion Sciences Institute, University of Southern California, August
Jan 28, 2008 MCONNECT(1)