I want alert through email, but found this error:
''NoneType' object has no attribute 'find' while sending mail firstname.lastname@example.org'
Version is 6.1.1.
I am getting this same error. Have you found the issue?
I fixed this issue on my end by changing the mail host from mail.test.com:25 to mail.test.com
Getting rid of the port fixed it for me.