Test before it runs
See what a rule would have done before it does anything. DMU Mail tries it on the last 200 conversations of a mailbox you choose, changes nothing, and won’t switch a rule on untested.

What it does
Try it first
Your own mail
Pick a mailbox and the rule is tried on its last 200 conversations.
Nothing is changed
No label, assignee or reply is touched, so a wrong guess costs nothing.
See why it matched
Each match shows the condition, and the words, that made it match.
Replies checked too
For an automatic reply, you see who would get it and why others would not.
How it works
Build, test, switch on
- 1
Build the rule
Set its When, If and Then in Settings › Automations. It does not need to be saved before you test it.
- 2
Run the test
Choose Test on recent mail, pick a mailbox and run it. The result lists the conversations that would have matched.
- 3
Switch it on
A rule can’t be switched on untested. DMU Mail runs the test if you haven’t, shows what it found, and offers to run it now on the open matches.
Good to know
The details
- Who can use it
- Whoever can make the automation: administrators for the organisation’s, and members for their own when allowed.
- Where
- In the automation, under Test on recent mail, in Settings › Automations.
- How much
- The last 200 conversations of one mailbox at a time. It runs in the background and changes nothing in them.
- After a change
- A rule that is on goes off if you change it without testing, until it has been tested again.
- Catching up
- Switching a rule on can also run it on open conversations that match. Closed ones are left alone, and no automatic reply goes to these.
Be one of the first teams in
We let a few organisations into the private beta every week. Join the waitlist and we’ll email you when there’s room for your team.
Three quick questions. No card needed.