Probably nobody knows about it but if you try to abuse gmail service to send mails like more than 500 recipient at a time or sending mails to un reachable email addresses get ready to get your accounts disabled from 25 to 74 hrs or gone for ever.
Here are some fact which
- If you access Gmail via POP or IMAP clients (like Microsoft Outlook) and send mail more than 100 at a time your account will be disabled for a day. Error “550 5.4.5 Daily sending quota exceeded.”
- If you access Gmail from the browser, you can not send email to more than 500 people at a time.Try it and your Gmail account will get probably disabled for 24-72 hours. Error: “Gmail Lockdown in Secton 4″
- There are 2 more which you can read at DI
- Download Squad Suggest to use listserver which I will be taking a look soon.
This is a good thing to take care of spammers, However you need not to worry so much if you are a normal user. Sending that amount wont just happen. However if you plan to do some mass mail, best is creating groups on Google or even on Yahoo