SMTP servers http://www.ultrasmtp.com SMTP blog Wed, 16 May 2007 17:58:55 +0000 http://wordpress.org/?v=2.3.1 en Open relay problem http://www.ultrasmtp.com/open-relay-problem/ http://www.ultrasmtp.com/open-relay-problem/#comments Tue, 15 May 2007 20:55:45 +0000 SMTP http://www.ultrasmtp.com/open-relay-problem/ If you have just installed SMTP server I suggest immediately lock it down so no other users (remote) can use it to relay email. There are many ways to test out for a open relay - you can use online service to check it remotely or if you have a remote shell, you can use telnet.

Open relaying has been a big problem for folks who do not know much about mail service and usually their smtp IP gets blocked due to spam - relayed email.

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