The POP3 module tests accounts against the POP3 service.
The module has a single option, MODE. If left unset, the default behavior is to check for either "+" or "-" in the server's response to see if the attempt was successful.
If the server being tested in an AS/400, the module should be executed
using the option -m MODE:AS400. This will result in the -ERR
message being returned to be parsed for addition information. This is
based on information gathered from the following document:
Enumeration_of_AS400_users_via_pop3.pdf
The module supports both POP3 (110/tcp) and POP3S (POP3 protocol over TLS/SSL)
(995/tcp). In addition, it supports the POP3 STARTTLS extention, as defined
in http://www.faqs.org/rfcs/rfc2595.html.
Medusa will submit a "STLS" command to the target server. If a positive response
is returned, a TLS session will be initiated.
Medusa Documentation