Presumably coincidental to NIS2010 17.5.0.127 update: Suddenly any email containing the character sequence "MKT.F" in message body is nontransmissible. No bounce msg received. Nothing indicated in NIS history/quarantine. I suspect spam interdiction while being handed off between multiple servers at ISP, though they swear no interception at send occurs. Specific char sequence itself is the clear issue: the slightest variation including suffixing renders it transmissible. Formatting irrelevant (HTML, RTF, ASCII). Same content was transmissible at least 09.10.01 - 10.01.22. Have examined logs of marginal variations of the message (thus transmissible) upon remote receipt; path is clearly home/ISP1 multiple servers/ISP2-IRONPORT/ISP2-popserver/office with no other intermediaries. Environment: MSOutlook2007, Vista64, NIS2010, popmail at both ends, CIcso routers & DLink switches are the only other elements in the chain.
- any chance it's NIS2010 related?
- any idea why that sequence might be objectionable to, say, Ironport or Postini?
- if anyone finds the culprit obvious, pls advise!
thanks
Diatom