Re: [exim] SMTP connection from (host) [ip] lost while readi…

joe7@??? wrote:
> Hi!
>
> I have several erros like this in log:
>
> SMTP connection from (host) [ip] lost while reading message data (header)
> .

Please don't obfuscate.
http://www.exim.org/eximwiki/DontObfuscate

> What is it caused by and how could I fix it? :|
> Some clients can't send data over SMTP due to this.

That problem can often be caused by MTU issues. Are you using PPPOE?
http://en.wikipedia.org/wiki/Maximum_transmission_unit

> Never seen this happening before upgrading to debian etch from sarge.. :|

It could be that you had MTU configured properly before, and the upgrade
broke it.

- Marc