Show OpenSMTPD queue and force sending queued mails

• Author: Solène
• Date: 24 October 2018
• Tags: opensmtpd highlight openbsd

NILIf you are using opensmtpd on a device not

always connected on the internet, you may want to see what mail did not go, and

force it to be delivered NOW when you are finally connected to the

Internet.

We can use smtpctl to show the current queue.

$ doas smtpctl show queue

1de69809e7a84423|local|mta|auth|so@tld|dest@tld|dest@tld|1540362112|1540362112|0|2|pending|406|No MX found for domain

The previous command will report nothing if the queue is empty.

In the previous output, we see that there is one mail from me to

dest@tld which is pending due to "NO MX found for domain" (which is

normal as I had no internet when I sent the mail).

We need to extract the first field, which is 1de69809e7a84423 in the

current example.

In order to tell opensmtpd to deliver it now, we will use the

following command:

$ doas smtpctl schedule 1de69809e7a84423

1 envelope scheduled

$ doas smtpctl show queue

My mail was delivered, it's not in the queue anymore.

If you wish to deliver all enveloppes in the queue, this is as simple as:

$ doas smtpctl schedule all