BUG: check_smtp, protocol problems

[Avleen Vig]

Hi folks,

I think I've found a bug in the current check_smtp.
The problem occurs with MTA behaviour that is becoming more common:
banner delays.

The theory is, that if someone sends you data before the end of the
banner (before a line starting '220 '), they are probably a spammer
Well behaved mail software waits for the checkpoints instead of just
blasting data down the pipe.

Unfortunately the plugin isn't well behaved.
As soon as the cnnection is formed, it sends the HELO to the server
being checked. It should wait for a like starting with three digits and
a space. If the three digits are 220, then everything is OK. Otherwise,
there's an error.

Unfortunately I don't know enough C to write a patch :(
Can anyone help?

-- 
Avleen Vig
Systems Administrator
Personal: www.silverwraith.com


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