telegram-mailgate is very similar to gpg-mailgate. This script is a content filter for Postfix to send mails via telegram. It is very minimalistic but it can be useful to receive say outputs from CRON directly to your mobile.
usage: telegram-mailgate.py [-h] [--config CONFIG] [--from FROM]
[--queue-id QUEUE_ID] [--raw | --simple-header]
to [to ...]
positional arguments:
to the recipients
optional arguments:
-h, --help show this help message and exit
--config CONFIG use a custom configuration file
--from FROM overwrite field "From" from the header. Ignored if
--raw is specified.
--queue-id QUEUE_ID specify the queue ID of the message for logging
--raw include all sections, header and attachments
--simple-header include a header in a separate message
sudo apt update && sudo apt install python3 python3-pip
sudo adduser --system telegram-mailer # create a specific user to run telegram-mailgate
sudo -u telegram-mailer pip3 install --user python-telegram-bot
sudo cp telegram-mailgate/telegram-mailgate.py /usr/local/bin/
sudo chown telegram-mailer /usr/local/bin/telegram-mailgate.py
sudo chmod 700 /usr/local/bin/telegram-mailgate.py
sudo mkdir /etc/telegram-mailgate
sudo cp telegram-mailgate/{main.cf,logging.cf,aliases} /etc/telegram-mailgate/
Edit /etc/telegram-mailgate/main.cf to configure your telegram API key.
Edit /etc/telegram-mailgate/aliases to configure the mapping between the recipients' addresses and the corresponding chat ID. The format is:
Adam 00000000
Bob 00000001
Charlie 00000002
The format does not support comments nor empty lines.
You can optionally edit /etc/telegram-mailgate/logging.cf to configure the logging. The default logs to syslog.
In /etc/postfix/master.cf, add the following process:
# =======================================================================
# telegram-mailgate
telegram-mailgate unix - n n - - pipe
flags= user=telegram-mailer argv=/usr/local/bin/telegram-mailgate.py --simple-header --queue-id $queue_id $recipient
Make sure that whatever user you specify above has permissions to execute telegram-mailgate and python dependencies installed. Of course you can set whatever arguments for the script.
In /etc/postfix/main.cf add telegram-mailgate as a content filter:
content_filter = telegram-mailgate
Restart postfix
# postfix reload
echo "This is the body of the email" | mail -s "This is the subject line" <my_recipent>
replace <my_recipient> by who ever is listed in the alias file. If local user, you may need to add @ at the end.
You can see logs with sudo tail -f /var/log/mail.log.