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How I am handling msmtp queues
From: |
Jean Louis |
Subject: |
How I am handling msmtp queues |
Date: |
Thu, 10 Mar 2022 09:23:45 +0300 |
I wish to describe how I use Emacs Lisp to send emails.
msmtp is about sending emails from computer:
Description : A mini smtp client
URL : https://marlam.de/msmtp/
For longer time I have used msmtp by cron job. However, that somehow
blocked itself, some colliding msmtp processes were in memory and I
had to kill them all before running msmtp-runqueue.sh script
Often I have thousands of emails in the queue, and sending them
reliably is important. Cron job for some unknown reasons did not do
well.
Then I have made this Emacs Lisp function.
;;;; MSMTP
(defun msmtp-count-remaining ()
"Count and send remaining MSMTP messages in the queue"
(interactive)
(let ((count (length (directory-files "~/.msmtpqueue" nil "\\.mail"))))
(if (> count 0)
(progn
(async-shell-command "msmtp-runqueue.sh" "*msmtp*")
(message "There is %s e-mails in queue." count))
(message "No emails."))))
And I run the function with timer so that it is repeated every
minute. If there are some emails in the queue, the function will
dispatch them.
;; (run-with-timer 0 60 'msmtp-count-remaining)
Additionally I have adjusted the variable `display-buffer-alist' so
that buffers matching "msmtp" have function `display-buffer-no-window'
so that the buffer does not appear on screen when running the queue.
I can run the above Lisp with M-x msmtp-count-remaining or the timer
will run the script and send any messages in the queue.
And original msmtp script is here:
msmtp-runqueue.sh
=================
#!/usr/bin/env bash
QUEUEDIR="$HOME/.msmtpqueue"
LOCKFILE="$QUEUEDIR/.lock"
MAXWAIT=120
OPTIONS=$@
# wait for a lock that another instance has set
WAIT=0
while [ -e "$LOCKFILE" -a "$WAIT" -lt "$MAXWAIT" ]; do
sleep 1
WAIT="`expr "$WAIT" + 1`"
done
if [ -e "$LOCKFILE" ]; then
echo "Cannot use $QUEUEDIR: waited $MAXWAIT seconds for"
echo "lockfile $LOCKFILE to vanish, giving up."
echo "If you are sure that no other instance of this script is"
echo "running, then delete the lock file."
exit 1
fi
# change into $QUEUEDIR
cd "$QUEUEDIR" || exit 1
# check for empty queuedir
if [ "`echo *.mail`" = '*.mail' ]; then
echo "No mails in $QUEUEDIR"
exit 0
fi
# lock the $QUEUEDIR
touch "$LOCKFILE" || exit 1
# process all mails
for MAILFILE in *.mail; do
MSMTPFILE="`echo $MAILFILE | sed -e 's/mail/msmtp/'`"
echo "*** Sending $MAILFILE to `sed -e 's/^.*-- \(.*$\)/\1/'
$MSMTPFILE` ..."
if [ ! -f "$MSMTPFILE" ]; then
echo "No corresponding file $MSMTPFILE found"
echo "FAILURE"
continue
fi
msmtp $OPTIONS `cat "$MSMTPFILE"` < "$MAILFILE"
if [ $? -eq 0 ]; then
rm "$MAILFILE" "$MSMTPFILE"
echo "$MAILFILE sent successfully"
else
echo "FAILURE"
fi
done
# remove the lock
rm -f "$LOCKFILE"
exit 0
Jean
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- How I am handling msmtp queues,
Jean Louis <=