Is there a way to detect non-7bit headers such that they can be flagged for post-queue filtering? Postfix' header_checks (with or without PCRE) would be ideal but I'd like to know if this is doable in Spamassassin or Amavisd-new as well.
Before I get labeled an ASCII bigot the problem is security. Certain smart phones are susceptible to viruses and trojans passed via non-ASCII email headers. Javascript seems to be the language of choice for these exploits but it is not the only way to target email clients. The main problem is that no smartphones are yet designed with good security. A secondary problem is the sending of non-RFC compliant 7 bit clean headers. My preferred solution would be tagging for evaluation but a web search has turned up nothing straightforward. Pat
