sendmail interface...

[rcfa]

There are a whole bunch of Unix/Linux command line tools which use sendmail to deliver mail. Even on systems without the actual sendmail installed, a variety of other MTAs provide a compatibility interface for such tools.
Am I correct that stalwart does no such thing?

What is the recommended setup to have scripts like e.g. cron scripts delivering reports, etc. not fail?

[andreymal]

I use msmtp-mta

[rcfa]

Hm using this in sendmail mode as front-end to stalwart might solve the issue.
Would you care to share your (obviously stripped of sensitive information) /etc/msmtprc to make this work?

[andreymal]

Basically mindlessly copied from ArchWiki

defaults
tls_trust_file /etc/ssl/certs/ca-certificates.crt
logfile        /var/log/msmtp/msmtp.log

account        default
host           mail.example.org
port           465
tls            on
tls_starttls   off
from           [email protected]
auth           on
user           [email protected]
password       correcthorsebatterystaple

mail.example.org points to 127.0.0.1 on the server where Stalwart is installed (via /etc/hosts)

The [email protected] account is created via the API / webadmin

(Also chown root:msmtp and chmod ug+rw,o-rwx and some logrotate config for /var/log/msmtp/msmtp.log)

[williamdes]

Am I correct that stalwart does no such thing?

It does not install any sendmail binary or script

What is the recommended setup to have scripts like e.g. cron scripts delivering reports, etc. not fail?

I did some research because I would like my servers to have a simple binary that sends all the traffic to one host that will email or do something with the received email.

The research shows that programs look for hard coded path to files to exist.
In /usr/include/paths.h there is a variable _PATH_SENDMAIL set to /usr/sbin/sendmail
The variable is used in https://sources.debian.org/src/cron/3.0pl1-189/config.h/
And here is checks for the file: https://sources.debian.org/src/cron/3.0pl1-189/do_command.c/#L526-L535

Other tools do search on multiple paths:

• https://sources.debian.org/src/libcgi-formbuilder-perl/3.10-6/lib/CGI/FormBuilder.pm/?hl=1559#L1559 (/usr/lib/sendmail /usr/sbin/sendmail /usr/bin/sendmail)

The conclusion is that this mailserver could provide a local sendmail binary to forward emails into the system

[mdecimus]

You can also curl your emails to Stalwart:

$ curl smtp://localhost:25 --mail-from [email protected] --mail-rcpt [email protected] --upload-file ~/email.txt

[rcfa]

Is there a way to supply the message body as a string?
I assume, since it’s coming from the localhost, authentication isn’t required?