Additional Info: The cause was because I had a space at the end of the email address.
For those emails that ended with a space, Thunderbird put the email address in quotes, making it unusable. -- thunderbird adds quotes to email addresses https://bugs.launchpad.net/bugs/426959 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
