Re: [exim] Some Outlook / Express not sending authentication…

On 24 February 2010 07:51, Jaco Meintjes <jaco@???> wrote:
> Hey Guys, I've got a strange one: Some of our machines running Outlook / Outlook Express looks like they're simply not sending authentication to Exim (and it's doing this on about 40% of the Outlook users). For example on one of these machines I decided to load   Here's a log
> example:
>
> 2010-02-23 12:46:45 H=dsl-245-216-168.telkomadsl.co.za (RuanVanWykPC)
> [41.245.216.168] F=<ruanvipexp@???>  rejected RCPT
> <ruanvipexp@???>: Invalid HELO (RuanVanWykPC).


This error indicates your Exim rejected the HELO issued by the client
- which is before the client tries to authenticate.
Make use of 'exim -bh IP' which will help show you where your HELO
problem is occurring and why (hint: have a look at your config for the
acl_smtp_helo acl and any other conditions that might have 'verify =
helo' set somewhere).

Also beware of restrictive helo/ehlo checks on an outbound relay server.


.warren