It's time to open "openrelay.txt" again:Thanks for the help. I've change the spool directory. Any idea how come this IP manage to Queue so many emails on my server despite it is not in my relay list?
IMail's SMTP Security options have a number of relaying choices. Of them, only 2 can be used safely (the rest cause you to be an open relay). The two safe options are "Relay for Addresses" and "No Mail Relay".
If you use IMail's "Relay for addresses", you would enter a list of "safe" IP addresses that your users may come from; anyone not coming from those safe IPs would need to use SMTP AUTH. If you use "No mail relay", everyone must use SMTP AUTH to relay mail. Note that relay settings apply only to outgoing E-mail, so no matter what your settings are, your users will still be able to get mail.
So to reiterate: "Relay for Addresses" or "No Mail Relay" are safe; everything else will get you listed in a number of spam databases.
In this case, either [1] You are not using one of the correct settings, and are an open relay, [2] You have an incorrect IP range that you are allowing access to, or [3] (very unlikely in your case) The spammer knows the password of one of your accounts.
-Scott
---
Declude JunkMail: The advanced anti-spam solution for IMail mailservers.
Declude Virus: Catches both viruses and vulnerabilities in E-mail, with no annual licensing fees.
---
[This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)]
To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html
List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
