I have seen this error as well, and found the problem to be the email address having a leading 'space'.
For example, I was passing an email address like this: " Bob Smith <[email protected]>" and was getting the error. As soon as I stripped the space away with '.strip' before I assigned it to 'recipients', the error went away. Not sure which part of the code (gem or ruby) was choking on the whitespace. I didn't investigate further. I am using Action::Mailer 2.2.2. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---

