New user issue: Campaign emails don't send (but test email does)

Product Support
1

Your software
My Mautic version is: v5.1.1
My PHP version is: 8.1.29
My Database type and version is: 10.6.19-MariaDB-deb11-log

Your problem
First-time user here, so this may be a noob question.

I have created a test follow-up-sequence (campaign) with two emails, one to go out immediately, followed by another three minutes later.

I have set up a simple name/email form and used it to add 3 contacts. They show up under “Contacts” in Mautic and also show in the campaign itself.

By problem is, the two test emails aren’t going out.

I have tried sending a test email twice from Settings > Configuration > Email Settings, and they come through instantly.

The campaign appears to be live (set to Available).

Currently Mautic is still using the default SMTP through localhost:25. Could this be an issue?

If not, what could I check? Thanks in advance for any help.

The log shows no errors.

2

My hunch is that this is simply an issue of cron jobs not being configured. Looking into that now.