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Re: Yahoo! Mail Issue
From: Brielle Bruns <bruns () 2mbit com>
Date: Mon, 11 Apr 2011 22:54:01 -0600

On 4/11/11 10:47 PM, Matthew Petach wrote:


mpetach () opstools1:~>  telnet 219.90.94.56 25
Trying 219.90.94.56...
Connected to static-host-219-90-94-56.tri.ph.
Escape character is '^]'.
ehlo yahoo.com
554 SMTP synchronization error
Connection closed by foreign host.
mpetach () opstools1:~>


I imagine when port 25 stops giving 5xx
failure message back, mail reception
might improve.   ^_^;



Works fine for me, your getting an error because your trying to send a command before receiving the first 220, aka RFC violation. As long as you connect, wait a moment without trying to send a command, your fine.


telnet 219.90.94.56 25
Trying 219.90.94.56...
Connected to static-host-219-90-94-56.tri.ph.
Escape character is '^]'.
220 stluke.com.ph ESMTP MailCleaner (Community Edition 2010 beta 3) Tue, 12 Apr 2011 12:51:38 +0800



My systems do it too if you try to send a command before waiting for the 220s to finish:

telnet mail.sosdg.org 25
Trying 2620:64:0:1::2...
Connected to mail.sosdg.org.
Escape character is '^]'.

554 SMTP synchronization error
Connection closed by foreign host.


Its an effective antispam method, because bots rarely bother to wait. They just blast away



--
Brielle Bruns
The Summit Open Source Development Group
http://www.sosdg.org    /     http://www.ahbl.org


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