Occasionally when I send an email (from fastmail or gmail) from Aerc and the body of the email is only a URL, the email that gets sent is blank, without the URL. I haven't been able to consistently produce this, and I believe this occurs when #269 occurs, but I'm not sure.
See my message here
It seems as though, if there is content after the URL in the email, the URL is parsed as an email header. Not sure what the best way to fix this is, as a url is technically a valid email header