frond -> RE: (command+line+too+long) (25.Jul.2005 3:22:00 PM)
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We're having exactly the same problem. All inbound mail is working perfectly fine except for one particular remote company. If they telnet to us on port 25 and send EHLO company.com, they get: 421 5.5.2 Syntax error (command line too long)
If they do just an EHLO with no domain name, then it works.
The strange thing is that if I repeat the same test from any other external site, I have no problem. It's only an issue with this one remote company and I have no idea why ISA has decided to pick on just them.
I saw another post on this forum indicating that some servers pad the NOOP command to make it bigger than the RFC defined 6 bytes, but that doesn't seem to be the case here because they don't get that far. They just telnet, type the EHLO domain.com command, and it fails.
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