In the "Form Components" section of the webform, I had a textfield called "Subject".
Because of this no email was sent, and no error was generated. From the logs, it looks like the mail module was not even called.
I spent quite a few hours on this, looking for issues with spam, from email address, etc.
Emails started working after a renamed the textfield "Subject" to "Subject of message".
I did not look into the code, this bug report is purely empirical.

Comments

quicksketch’s picture

quicksketch
he/him
commented
Status: Active » Postponed (maintainer needs more info)

That's a bit odd, since the label of the component should be irrelevant. Did you change the "Form key" also? I don't think either have any effect overall. Almost all of my forms have "Subject" as the subject component. After trying to reproduce this problem, things work as expected for me. Unless this can be reproduced from a fresh install, I think it's likely your problem was coincidentally fixed just by resaving the component. Could you try changing it back to "Subject" and see if it continues working?

quicksketch’s picture

quicksketch
he/him
commented
Status: Postponed (maintainer needs more info) » Closed (cannot reproduce)

Closing after lack of response. I cannot reproduce any similar issue.