Re: [Exim] protocol violation: synchronization error

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Autor: Tony Earnshaw
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A: exim-users
Assumpte: Re: [Exim] protocol violation: synchronization error
Odhiambo G. Washington wrote:

> Since upgrading to 4.24 I am seeing alot of
>
> "SMTP protocol violation: synchronization error (input sent without waiting for greeting)"
>
> I haven't seen anything in common with these hosts. Some seem to be client machines
> using som MuA while the others are MDaemon server by Deerfield, or whatever it
> is now ;)


Deerfield is now NAI. Surprise, surprise.

> I have searched the archives and saw a suggestion which, to my understanding, seemed
> Outlook-centric. It suggested running another Exim daemon on port 465. I have done
> this by basically starting another Exim daemon with "-bd -oX 465 -tls-on-connect"
> I have tested if this is running using
>
> openssl s_client -connect ns2.wananchi.com:465


This was a new one on me. Very useful :)

> .. and it behaves.
>
> What I am lost about is how all this should fit in with the MDaemon problem.
> I don't think MDaemon is as dumb as M$ Outlook.


I don't think it's anything to do with port 465. I think it's due to the
client maybe giving a ehlo/helo, maybe not and not waiting for a 250;
just banging the helo together with mail from:, without even a carriage
return/newline.

Maybe the person sending it should apply the patch that I keep on
getting from friendly people all over the world, sometimes 4 from the
same person. Up to now, getting on for 4.000 friendly people have sent
me that patch. Unfortunately I don't run Outlook, so I can't apply it ;)

--Tonni

--
Tony Earnshaw

Once the camel's head has entered your tent,
it's very difficult to stop the rest of the
animal from following it

http://www.billy.demon.nl
Mail: tonye-at-billy.demon.nl