[Modus] Use of "Validate sender addresses"

[Mike McTee]

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)