OT: Sendmail issues with MAIL/EXPN/VRFY/ETRN

Anders Andersson, IT anders.andersson at LTKALMAR.SE
Thu Aug 19 19:01:11 IST 2004

> -----Ursprungligt meddelande-----
> Från: Peter Bonivart [mailto:peter at UCGBOOK.COM] 
> Skickat: den 19 augusti 2004 19:18
> Ämne: Re: OT: Sendmail issues with MAIL/EXPN/VRFY/ETRN
> Anders Andersson, IT wrote:
> > Im getting loads of this in my log and cant figure out why:
> > Aug 19 17:16:47 ns2 sendmail[30108]: i7JEGk4c030108:
> > host-207-254-243-131.classicnet.net [] did not issue 
> > MAIL/EXPN/VRFY/ETRN during connection to MTA
> I only get those from our systems monitoring tool (Nagios). 
> It checks if smtp is available by connecting to port 25 and 
> then dumps the connection, it's just interested in the answer 
> and never follows through with a message. I have never seen 
> it from "outsiders".
> If you follow the msgids, are they successfully delivered, or what?
The connections that will get this wont be delivered. Since I know legit
companies tried to send Im wondering if it a RFC issue or if it got
somethign to do with TLS. Im lost but after turnign on saslauthd it seems to
be less problems even if its not perfect.
But I really dont like it since I dont have a clue what it does.

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