Having problems with workflows on I module I created

[joebordes]

It is the "from name" that has to be a valid email or most SMTP servers will reject the email

There is currently a validation in the outgoing server configuration to impose that but it was added a 6/7 months ago so you may not have that validation.

I recommend always leaving "from" empty, it is used in very scarce use cases.

Let us know how it goes.