[Pkg-exim4-users] Not all mail received

[Alastair Davies]

Hello,

I've been running the Debian exim4 package on a co-located host for (a 
small number of) family and friends for several months now, and 
generally have experienced no problems.  Except, I have become aware 
that not all mail sent to us is being received by us. 

For example, the host name is aldavies.net and my mail name is alastair, 
but when I attempted to subscribe to this list using this address, I did 
not receive the confirmation email.  (That is why I am using my Yahoo 
account.)  There is a similar problem with receiving mail from 
openBC.com, and from Ryanair.com.  (In other words, it is mail from some 
web sites that I am not receiving; mail from friends is OK.  It is also 
consistent, in that no mail from these sites is ever received, no matter 
how often I try.)  I haven't tinkered with the default Debian settings 
beyond entering my details in the configuration wizard.

I have a couple of questions, that I'd be very grateful for the benefit 
of your experiences in answering. 

When I am searching for a known missing message, where should I look?  
Are the log files in /var/log/exim4/ the place to start?  AFAICT, there 
is no trace of these message in there.

Is this (likely to be) happening because of the strictness of the 
default ACLs?  Is there an advisable loosening that is commonly performed?

Many thanks.  Any other suggestions or comments gratefully received.
Alastair

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