Rails mass mailer

I've stumbled upon Rails ActionMailer. I never saw any other limitations about how many e-mails can be sent in one event. So I just confidently get all e-mail address and send it in one event as @bcc.

A month ago, an error always occured when sending emails. At the moment I don't pay attention with e-mails limitations so I began searching at the wrong place. Today I finally found that 80 e-mails probably is the limitations.

So, If you have an error when sending e-mails, pay attention to this. Maybe you need to separate into some event. In my case, I did a loop on e-mail address and sending e-mail on each loop.

Note: Some said that 100 is maximal limitations like http://www.myowndb.com/blog/?p=20 but I had no luck with that number.