Does anyone here know of a legitimate MTA, proxy/filter, IDS, or similar
critter that sends this verb before sending EHLO?
FCCKV2 zQUdwkgzYhu/noMgcNtA0wvhrV0T9SThL3koEfk=
I'm suspicious that it's a malware infection on the sender's host, but
before I start making accusations I wanted to check around. Various web
forums have also reported seeing this as an X-bar header line in HTTP
requests, without identifying what it was.
<csg>
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