[Modus] Use of "Validate sender addresses"

[Mike McTee]

Hi Bill,   I agree with you.  My thoughts were if it didn’t cause a noticeable performance hit and it caused any grief to the occasional spammer that it might hinder, it could help a little though.       Sincerely, Mike McTee Internet Systems Technician Eastex Net (www.eastex.net)       -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Rakowitz Sent: Tuesday, December 30, 2003 11:39 AM To: [EMAIL PROTECTED] Subject: [Modus] Use of "Validate sender addresses"   Hi Mike,   My thought is that while the majority of junk email senders are using a forged email address, they are using valid domain names (hotmail, yahoo, usa.net).   YMMV,   Bill Rakowitz YK Communications   -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike McTee Sent: Tuesday, December 30, 2003 10:35 AM To: [EMAIL PROTECTED] Subject: [Modus] Use of "Validate sender addresses"   Is anyone using this feature (detailed below), on MM 3?  If so, do you experience a performance hit due to the DNS lookup and what did you set the cache size to?       Validate sender addresses If this option is enabled, the mail server will look up the domain name in the MAIL FROM: command to ensure that a valid A record or MX record exists in the DNS. If there is no record of this domain name, the message will be deemed illegal and discarded. Note that this option may slow performance of your system, as DNS lookup requires some time. You can also specify the cache size for sender address validations.         Sincerely, Mike McTee Internet Systems Technician Eastex Net (www.eastex.net)