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Knowledgebase : Technical Help > IceWarp Version 10 > IceWarp Mail Server Administration > Email Filtering/Routing
 

RELAYSERVER, DNS LOOKUP AND SMTP ROUTING Nowadays , unfortunately, it is not rare for a remote system to reject emails from you. If you check the SMTP logs, you will note that right after you connect to a remote system to send an e-mail, you are disconne...
INTRUSION PREVENTION Intrusion prevention, formerly called tarpitting, is a great feature, which has one main feature of avoiding spam dictionary attacks, where spammers try to send messages to any addresses they have on their dictionary containing thou...
This filter is not recommended because most notification messages and some messages from mailing lists are sent with an empty Mail From. To reject such messages you have to create a CONTENT FILTER which will match these messages. Go to the _MAIL SERVI...
WHY THERE IS AN ATTACHMENT CALLED WINMAIL.DAT INCLUDED IN THE RECEIVED MAIL? _APPLICABLE ONLY WITH OUTLOOK 2007 AND OLDER VERSIONS_ This is a feature of older versions of Outlook and Outlook Express. The winmail.dat file contains data to preserve messa...