When i use armailer on my development machine i works perfectly. But
when i tries to use it at my production server i get this error message

dependencies.rb:442:in `load_missing_constant’:NameError: uninitialized
constant ActionMailer::ARMailer

Anyone who have hade the same problem or know the solution.

googles first result reveals the following thread:

in the end someone states, that he fixed it. maybe the same thing
works for you.