This caused me a lot of grief and debugging time.
I am using code like this to send emails from a CGI script:
Net::SMTP.start('smtp.example.com', 25) do |smtp| smtp.open_message_stream('firstname.lastname@example.org', ['email@example.com']) do |f| f.puts 'From: firstname.lastname@example.org' f.puts 'To: email@example.com' f.puts 'Cc: firstname.lastname@example.org' f.puts 'Subject: test message' f.puts f.puts 'This is a test message.' end end
and this is failing silent in my case.
I have discovered through trial and error that if I remove the -(dash) from the to address it works. Dashes in from or CC addresses does not matter.