class Notifier < ActionMailer::Base
   def signup_notification(recipient)
     recipients recipient.email_address_with_name
     bcc        ["bcc@example.com"]
     from       "system@example.com"
     subject    "New account information"
     body       :account => recipient
   end
 end

Actually, yesterday we were getting “uninitialized constant ActionMailer::Quoting::Encoding” while using ActionMailer in production but it was working fine in all modes(development/production) on localhost. Our mailer was like:

 class Notifier < ActionMailer::Base
   def signup_notification(recipient)
     @recipients   = recipient.email_address_with_name
     @bcc            = ["bcc@example.com"]
     @from          = "system@example.com"
     @subject       = "New account information"
     @body          = :account => recipient
   end
 end

We could not find the actual issue with this mailer. But the above said error was disappeared when we changed the same mailer as following:

 class Notifier < ActionMailer::Base
   def signup_notification(recipient)
     recipients recipient.email_address_with_name
     bcc        ["bcc@example.com"]
     from       "system@example.com"
     subject    "New account information"
     body       :account => recipient
   end
 end

Do you guys have any idea? I would love to listen from you.

Update: No its not solved yet. Still same issue. May be some issue with character encoding with the TMail object.

Update 2: This was the issue http://github.com/hmcgowan/roo/issues#issue/4/comment/106328

OpenSSL::SSL::SSLError (hostname was not match with the server certificate):
    /usr/lib/ruby/1.8/openssl/ssl.rb:123:in `post_connection_check'
    /usr/lib/ruby/1.8/net/smtp.rb:582:in `tlsconnect'
    /usr/lib/ruby/1.8/net/smtp.rb:562:in `do_start'
    /usr/lib/ruby/1.8/net/smtp.rb:525:in `start'
    /vendor/rails/actionmailer/lib/action_mailer/base.rb:671:in `perform_delivery_smtp'
    /vendor/rails/actionmailer/lib/action_mailer/base.rb:526:in `__send__'
    /vendor/rails/actionmailer/lib/action_mailer/base.rb:526:in `deliver!'
    /vendor/rails/actionmailer/lib/action_mailer/base.rb:392:in `method_missing'
    /app/controllers/users_controller.rb:40:in `send_email_to_confirm_user'

Actually, Rails 2.2.2 turn on STARTTLS if it is available in Net::SMTP (added in Ruby 1.8.7) and the SMTP server supports it.

If you use postfix, then you fix it quickly by disabling tls by setting “smtpd_use_tls=no” in /etc/postfix/main.cf .

Remember to restart postfix and rails app server.

Error occurred specially when dealing with some image handling, or with attachment_fu.

The cause of this error is image_science 1.1.3 . Add :processor => “Rmagick” to has_attachment options and get rid of this problem.

Enjoy!!!

Also if you have 2-3 or more apps running in production then managing such exception mails is also a big headache. In such case one have to keep track of many things like which type of error is resolved/unresolved for which project etc… .

So, here is a good news for those who don’t know about Hoptoad. It is an hosted service by thoughtbot which receives your exceptions, notify you once per error type by email and keep track(resolved/unresolved, count etc…) of your errors on project basis.

By now its a free service. I’m gonna use this as my next project goes live. What abt you??? ;-P

Let me explain, I was using this plugin for one of my project and our server got a DOS attack. We were requested some URLs that doesn’t exists, like http://somedomain.com/game.rar etc… . I had registered my gmail account to get notification mails. And due to this attack I was sent around 7631*61 mails in 10 hrs. This made me crazy, because I was unable to receive any other email as (may be) my queue was busy with receiving notification mails. Then gmail started bouncing back those mails saying “The Gmail user you are trying to contact is receiving mail at a rate that prevents additional messages from being delivered. Please resend your message at a later
time”. And then it became a loop, Gmail-My Server-Gmail.

I found 303552 mails in postfix queue of my server. That were ready to send to gmail. Now my first priority was to clean that postfix queue, so I did it by issuing “sudo postsuper -d ALL”. I hope to receive mails ASAP, It is now more than 48 hrs i received any genuine mail.

So I request you to be careful while using this plugin

Note: Since my gmail account not receiving mails, so please sent it to akhil at vinsol dot com