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Email Relay is one of the more annoying features of email servers. However, there are times it can be pretty useful. It’s annoying because Spammers love to exploit it, and it’s useful because it can allow you to centralize a lot of email services. What is Email Relay? Email relay is, quite simple, a feature […] f you have an Exchange 2007 or Exchange 2010 server and you discover that you are an Open Relay, there is a very simple command that you can run from the Exchange Management Shell to close this down. The command is: Get-ReceiveConnector “YourReceiveConnectorName” | Remove-ADPermission -User “NT AUTHORITY\ANONYMOUS LOGON” -ExtendedRights “ms-Exch-SMTP-Accept-Any-Recipient” Replace “YourReceiveConnector” with the […] Qmail is a modern, secure and powerful SMTP email system. We used QmailRocks as a qmail installation resource. I would like to introduce few step for “Block Spam Mails with Qmail“. 1. Qmail block mail from spammers based on the envelope sender Qmail has the ability to unconditionally block mail from spammers based on the […] qmail is a secure, reliable, efficient and simple MTA written by Dan J. Bernstein. It has been security bug free since 1998 and is freely available. But vanilla qmail does not support security mechanisms like SMTP authentication or support for SSL/TLS. While it supports RBL via tcpserver, it has no Anti-Spam-Features like checking the Envelope-From […] |
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