Re: [exim] Configuring exim to use an non-TLS connection to …

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Autor: Jeremy Harris
Fecha:  
A: exim-users
Asunto: Re: [exim] Configuring exim to use an non-TLS connection to port 587.
On 11/04/2023 23:50, Peter via Exim-users wrote:
> From:    Graeme Fowler via Exim-users <exim-users@???>
> Date:    Tue, 11 Apr 2023 18:44:22 +0100
>> From
>> https://www.exim.org/exim-html-current/doc/html/spec_html/ch-encrypted_smtp_connections_using_tlsssl.html (sec 10):
>>
>> "... setting hosts_avoid_tls (an option of the transport) to a list
>> of server hosts for which TLS should not be used."
>
> I wonder how that is done.
>
> $ find /etc/exim4/ -type f -exec grep "hosts_avoid_tls" '{}' \; -print
>   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
> /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp_smarthost
>   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
> /etc/exim4/conf.d/transport/30_exim4-config_remote_smtp
>   hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS
>   hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS
>
> Obvious questions before recklessly diving into changes.
>
> (1) Macros are mentioned frequently in Exim documents.  In general,
> the meaning of "macro"  depends upon the context.
> https://en.wikipedia.org/wiki/Macro#Computing
> What is a macro in Exim?


Described in the Exim documentation:
https://exim.org/exim-html-current/doc/html/spec_html/ch-the_exim_runtime_configuration_file.html#SECTmacrodefs

> (2) Lines above containing "=" signs are assignments?


Those specific ones are option settings.

> (3) An entity to left of = is a variable?  Similar to a shell variable?


No. Read the docs.

> (4) What is an entity in all caps, right of =?


Almost certainly a macro.

> Of course, looked for answers in various docs before posting this.
> /usr/share/doc/exim4-base/README
> /usr/share/doc/exim4-base/README.Debian
> /usr/share/doc/exim4-config/README.Debian
> https://wiki.debian.org/PkgExim4UserFAQ
> https://en.wikipedia.org/wiki/Macro#Computing
> Nothing particularly helpful.  =8~/


The first hit from either duckduckgo or google gets you to the right place.
So did Graeme's mail you included.

--
Cheers,
Jeremy