>>494
はい。ぐぐってもわかりませんでした（汗

# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 example.com ESMTP
ehlo localhost
250-example.com
250-AUTH LOGIN CRAM-MD5 PLAIN
250-AUTH=LOGIN CRAM-MD5 PLAIN
250-PIPELINING
250 8BITMIME
auth plain dXNlcgB1c2VyAHBhc3N3b3Jk
503 auth not available (#5.3.3)
quit