PuTTY's raw connection type is just a way of making a raw TCP connection. You can use telnet or nc to achieve the same thing in Terminal:
will@Darwin:~> nc relay.plus.net 25
220 relay.plus.net ESMTP Exim Tue, 04 Aug 2009 00:02:08 +0100
helo
250 pih-relay08.plus.net Hello [1.2.3.4]
quit
221 pih-relay08.plus.net closing connection
will@Darwin:~> telnet relay.plus.net 25
Trying 212.159.8.107...
Connected to relay.plus.net.
Escape character is '^]'.
220 relay.plus.net ESMTP Exim Tue, 04 Aug 2009 00:03:10 +0100
helo
250 pih-relay08.plus.net Hello [1.2.3.4]
quit
221 pih-relay08.plus.net closing connection
Connection closed by foreign host.
will@Darwin:~> nc relay.plus.net 25
220 relay.plus.net ESMTP Exim Tue, 04 Aug 2009 00:02:08 +0100
helo
250 pih-relay08.plus.net Hello [1.2.3.4]
quit
221 pih-relay08.plus.net closing connection
will@Darwin:~> telnet relay.plus.net 25
Trying 212.159.8.107...
Connected to relay.plus.net.
Escape character is '^]'.
220 relay.plus.net ESMTP Exim Tue, 04 Aug 2009 00:03:10 +0100
helo
250 pih-relay08.plus.net Hello [1.2.3.4]
quit
221 pih-relay08.plus.net closing connection
Connection closed by foreign host.
Telnet For Mac
Telnet is not available on High Sierra. I don't have the option to copy the telnet source folder from another mac and I'm wondering where/how I can get a legitimate copy of telnet. Edit I'm looking for a copy from a source outside of homebrew or macports. Telnet free download - Mocha Telnet, Putty for Mac, NiftyTelnet SSH, and many more programs. The Terminal app is the default CLI that comes bundled with the Mac, and is a rather.
Telnet For Mac Mojave
Aug 3, 2009 4:05 PM