Hello list, I recently found out an unsolicited e-mail that caused high CPU consumption by cyrus imap on different mailstores. The poisoned e-mail has a structure of over 31.000 repetiions of these 4 lines in the header
MIME-Version: 1.0 Content-type: text/html; charset=iso-8859-1 From: Magaly <ver...@club.com> Reply-To: fdsafdsaf...@xxxxxx The header lines are a bit less than 4 Megabytes. I'm running postfix 2.4.5 as MX for the domain that received this spam, and the only configuration line that seems to do some check regarding the header size is in main.cf.default: header_size_limit = 102400 Is there a way in postfix configuration to control the header size or the max number of lines the header has ? or do I need to write a content-filter ? Thank you all in advance, Carlos
