Thanks for your reply.
Unfortunately, it doesn’t feet my workflow.
I want to send an email immediately so that the contact when he switches to his inbox after submitting the optin form, he finds the email there. I am expecting so.
The best thing I’ve found is to set this config:
1/ “How should email be handled?” => “Send immediately”.
2/ Then create a form, and add in “Actions” tab the action “Send email to contact”.
But this has a disadvantage, the “Queue” mode is sacrified.
What I want is to build drip campaigns with the first email being sent immediately.
OK, also executing a cron job each minute may be resource-intensive.
It’s better to send immediately the first email in the sequence, then for the subsequent emails scheduled in the campaign, we can set a cron job that runs in 15 minutes or more.