Provide ability to throttle emails and notifications to support SMTP servers that throttle mail after a certain limit like Google/Gmail.

With customers starting to use cloud-based solutions, this scenario could be very common in the near future.

Workarounds

There are some ways to mitigate this problem:

• Set up Sender Policy Framework (SPF) and DKIM records in Google Apps for your domain to conform with Google's bulk sender guidelines. This serverfault.com thread also has a quick guide on this;
• Use the open source program PostFix for throttled SMTP relay. See this article to learn more about setting it up;
• Edit the Mail Queue Service's properties to increase the interval at which JIRA sends e-mails. This interval controls how frequently the mail queue is processed and could be used in conjunction with the other options to reduce the rate ofoutgoing mail;