Trying on port 25

Trying myserver...
<-- 220 myserver ESMTP Sendmail 8.14.1/8.14.1; Mon, 10 Dec 2007 04:26:33 +0100 (CET)
--> EHLO localhost (wait upto 300 seconds)
<-- 250-myserver Hello localhost [127.0.0.1], pleased to meet you
<-- 250-ENHANCEDSTATUSCODES
<-- 250-PIPELINING
<-- 250-8BITMIME
<-- 250-SIZE
<-- 250-DSN
<-- 250-ETRN
<-- 250-DELIVERBY
<-- 250 HELP
--> MAIL FROM:<test1@mydomain.com> SIZE=278 (wait upto 600 seconds)
<-- 250 2.1.0 <test1@mydomain.com>... Sender ok
--> RCPT TO:<test2@mydomain.com> (wait upto 3600 seconds)
<-- 250 2.1.5 <test2@mydomain.com>... Recipient ok
--> DATA (wait upto 300 seconds)
<-- 354 Enter mail, end with "." on a line by itself
--> . (wait upto 120 seconds)
<-- 250 2.0.0 lBA3QXVc007077 Message accepted for delivery
--> QUIT (wait upto 120 seconds)
<-- 221 2.0.0 myserver closing connection



When I try port 465 (SMTP + SSL)

Trying myserver...

(and after around 60 seconds)

    ... premature end-of-file from server ...
    ... premature end-of-file from server ...
premature end-of-file from server
premature end-of-file from server