On 5/20/22 22:10, exim-users--- via Exim-users wrote:
> I would check if it is possible to get rid of the smarthost style config 
> completely and configure as "internet site; mail is sent and received directly
> using SMTP". Exim will lookup MX for outgoing mail in DNS and take care of 
> delivery without any manual configuration. You should implement the usual 
> stuff
> to get your mail properly accepted and not marked as SPAM (you should do that 
> anyways).

These days, the network you're coming from is a very important factor. A 
subscriber network (business / residential) or so-called "cloud" networks are 
considered bad reputation, this often applies to the entire network and not to 
a specific IP address. It can be very difficult to get your mail through, even 
if you follow the recommendations wrt DKIM, DMARC etc.

The motivation to use a smarthost is clear.

> If you need only some manual routes, Debian has a (imho) nice default 
> configuration prepared for that, which is called hubbed hosts (relevant part 
> of
> exim4.conf.template):
>

>      transport = remote_smtp

> You only need to create /etc/exim4/hubbed_hosts and put a pair of destiantion 
> domain and mailserver(s) per line, (quoting exim4-config_files(5)):

> If necessary, you can put credentials for authorization into 
> /etc/exim4/password.client (one per line).

The remote_smtp transport does not use password.client. remote_smtp_smarthost 
does.

You can indeed use the hubbed hosts setup, it makes sense to edit 
/etc/exim4/hubbed_hosts rather than the main config file, but you'd just have 
to change the transport to remote_smtp_smarthost and then authentication would 
work.



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