Large (usually legitimate) HTML mails choking SA

[Kris Deugau]

Every so often we get a message or two stuck in our inbound mail queue 
because it took too long for SA to process during mail delivery.

For a little while there were actually runs of pure HTML-garbage spam 
over 500K;  those have been dealt with (and may have disappeared).

However, we've just had a couple of *legitimate* messages get stuck for 
essentially the same reason - a whole lot of pathologically bad HTML. 
(One looks like it was generated by Word, then converted to email by an 
MS mail library used by a third-party SMTP mailer.  There's maybe 5K 
worth of actual useful HTML in about 100K of QP-encoded HTML.  The 
others appear to be investment-related, where the sender has included 
the content as a base64-encoded .html attachment.)

Whitelisting these once they're found lets them bypass SA altogether, 
but in the meantime they get stuck in the mail queue.

Has anyone got any suggestions for decreasing the load SA imposes trying 
to process one of these?

-kgd