From a Command prompt, type:
telnet mailin-01.mx.aol.com 25
This specifies to telnet to port 25 on an AOL mail host.
The mail host identifies itself. This should be accompanied by several lines of introductory text (sample below):
220-mtain-di02.r1000.mx.aol.com ESMTP Internet Inbound 220-AOL and its affiliated companies do not 220-authorize the use of its proprietary computers and computer 220-networks to accept, transmit, or distribute unsolicited bulk 220-e-mail sent from the internet. 220-Effective immediately: 220-AOL may no longer accept connections from IP addresses 220 which no do not have reverse-DNS (PTR records) assigned. 421 4.4.2 mtain-di02.r1000.mx.aol.com Error: timeout exceeded Connection closed by foreign host.
''This is the standard greeting text issued after any successful connection to the AOL mail system. This text will be shown after a connection is made regardless of the state of the PTR record on the connecting IP. The last 2 lines are considered normal and do not indicate an error with your connection. If in doubt, you can check to see if you have reverse DNS (rDNS).''
Example.com specifies your mail server's domain. Your host's name will be repeated back to you by the AOL mail server, preceded by the name of the AOL server you are connecting to. For example:
then you will see: 250 HELP - this is normal. Keep going.
MAIL FROM: <email@example.com>
where firstname.lastname@example.org indicates the address the mail should appear to be from. Note: You must include the < > signs. If you type it correctly, you will see: 250 OK. If not, you will probably get a SYNTAX ERROR.
RCPT TO: <email@example.com>
Note: You must include the equality(< >) signs. If you type it correctly, you will see: 250 OK. If not, you will probably get a SYNTAX ERROR.
and you will see: START MAIL INPUT, END WITH "." ON A LINE BY ITSELF
Type a brief message, followed by
A successful transaction should appear. For example:
telnet mailin-01.mx.aol.com 25 Trying 18.104.22.168... Connected to mailin-01.mx.aol.com. Escape character is '^]'. 220-rly-da06.mx.aol.com ESMTP mail_relay_in-da06.3; Mon, 09 Feb 2014 13:54:08 -0500 220-America Online (AOL) and its affiliated companies do not 220- authorize the use of its proprietary computers and computer 220- networks to accept, transmit, or distribute unsolicited bulk 220- e-mail sent from the internet. Effective immediately: AOL 220- may no longer accept connections from IP addresses which 220 have no reverse-DNS (PTR record) assigned. EHLO example.com 250-rly-dd06.mx.aol.com yourhostname.example.com 250 HELP MAIL FROM: <firstname.lastname@example.org> 250 OK rcpt to: <email@example.com> 250 OK DATA 354 START MAIL INPUT, END WITH "." ON A LINE BY ITSELF testing 123 . 250 OK