Author: Tom Kistner Date: To: exim-dev CC: Tony Finch Subject: Re: [exim-dev] content scan results cache
On Thursday 05 January 2006 14:48, Tony Finch wrote:
> MailScanner has gained an interesting optimization recently, that may be
> worth adding to Exim. It takes a checksum of the message body, and if that
> matches the checksum of a message that has already been received it skips
> the full SpamAssassin and anti-virus scan and instead pulls the results
> out of a cache. This seems to be more effective than you might expect,
> even without any kind of fuzzy-matching in the checksum.
Good idea. Calculating an MD5 of the body would not be a major overhead. The
mbox spooling reads the whole message anyway.
