UPDATE: Now available on github : merb_tlsmail github page
My previous post on sending mail via a TLS SMTP server on merb covered monkey patching Merb::Mailer.
I took the time to code this up as a gem, using Merb's meta-programming routines to extend Merb:Mailer in a standard way (for merb that is). See this open ticket in the Merb lighthouse issue tracker to download the gem until it is released as a proper plugin.