[CentOS] sendmail

[Larry Martell]

On Mon, Oct 2, 2017 at 6:26 PM Stephen John Smoogen <smooge at gmail.com>
wrote:

> On 2 October 2017 at 18:03, Larry Martell <larry.martell at gmail.com> wrote:
> > On Mon, Oct 2, 2017 at 5:29 PM, Stephen John Smoogen <smooge at gmail.com>
> wrote:
> >> On 2 October 2017 at 17:21, Larry Martell <larry.martell at gmail.com>
> wrote:
> >>> I an running CentOS7 in a docker container. I need to send email from
> >>> that container so I installed sendmail and then I run:
> >>>
> >>> m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf` and when I try and
> >>> send mail it fails with:
> >>>
> >>> larry.martll at gmail.com... Connecting to [127.0.0.1] via relay...
> >>> larry.martll at gmail.com... Deferred: Connection refused by [127.0.0.1]
> >>>
> >>> Anyone know how I can configure sendmail so that I can send mail?
> >>
> >> Does this help any?
> >>
> >>
> https://stackoverflow.com/questions/26215021/configure-sendmail-inside-a-docker-container
> >
> > That post is a bit overwhelming. It has 20+ answers and all are
> different.
> >
> > I have another container running debian buster and in there I do"
> >
> > yes yes | sendmailconfig
> >
> > and then I can send mail. But I don't see sendmailconfig in CentOS7.
> > Is there an equivalent?
>
> Sendmail is not the standard email server for EL7 so I am a bit rusty
> here.  The item that caught my attention was the following:
>
> ------
> I figured out a way myself, although not the most elegant solution. I
> configured the sendmail inside my docker so as to Relay the request
> via host's ip. Add the following line to the file "/etc/mail/access
>
> Connect:<host_ip_here>          RELAY
> Also, in the host as well as docker, comment out the following line in
> the file "/etc/mail/sendmail.mc" by prefixing it with "dnl #" and
> suffixing with "dnl".
>
> DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')
> I passed the host ip as an environment variable to the docker
> container, so that it is configurable. Now the docker's sendmail will
> relay it's sendmail's smtp request via host machine.
>
> -------
>
> Beyond that I am not going to be much help as I have not had much
> experience with docker


Ok thanks I will try this. But I am not married to sendmail. I will use
anything that allows me to send mail from the container.

>
>