Outgoing Email Limitations
The following limits apply to the number of emails you may send from your Grid:
- 50 emails per minute
- 500 emails an hour
These limits are cumulative across all email users on your Grid, and include any mail scripts running on your sites.
Example: Your email users could send up to 50 emails per minute for 10 minutes, at which point you would hit the 500 per hour mark and reach the limit. You could then send another 500 emails the next hour.
Our servers currently have an automatic rate limiting feature in place that will throttle traffic once the ceiling has been reached. This will often display an error or bounceback message similar to the following:
email@example.com SMTP error from remote mail server after end of data: 550 Administrative Prohibition
Once the limit has been reached, your Grid will not be able to send mail again until the throttle has reset, which can take up to an hour.
Spam score limitations
Messages containing a high spam score are automatically metered on an hourly basis as well. Once more than five such messages have been sent, you will be temporarily blocked. For more information, please see this article.
Note that the total amount of email coming from your server may be more than just the personal emails you send through your email software. Many popular Content Management Systems that are used for blogs, forums, wikis, etc. include the ability to send periodic email notifications to your subscribers. Make sure that you keep those mass emails throttled below our limits. Here are a few suggestions for how to do this:
- Use other notification methods, such as RSS or one daily email digest.
- Limit or disable mass email features in your CMS software.
- Configure your CMS to throttle the rate of sending mail to stay within our guidelines.
- Set up your CMS to use a third-party SMTP server.
- Use phplist, a very popular mass mailer program for sending bulk email. It includes a throttle feature. (Please note that (mt) Media Temple is not responsible for any third-party software.)
Although we strictly prohibit spam sent from our services, we understand that many customers send out legitimate, subscription-based emails on a regular basis. Unfortunately, the Grid is not designed for mass delivery of opt-in newsletters or marketing-related emails. We strongly advise using a third-party mailing list service for the delivery of such messages, or using software that can throttle the mailout rate appropriately.
You can also send email without restriction on a DV or DV Developer server. For instructions on migrating to a DV, please click here.
The DV server comes with the "Qmail" mail server installed by default. (mt) Media Temple does not place any limitations on the number of emails you can send. However, you will be limited by your overall system resources. In addition, should your IP address end up on a block list due to your email activity, you will be solely responsible for resolving that and/or improving your IP's reputation. Please use your service responsibly.
By default, the (ve) Server is provisioned without an email server on it. This provides you with the flexibility to choose a mail server. The DV server comes with "Qmail" preinstalled. You may install any software you like on your (ve), as long as it is compatible with the operating system you are running (the (ve) allows you to choose from several different operating systems as well).
Once you have a mail server installed, you can technically send as much email as you like. However, you will be limited by your overall system resources. In addition, should your IP address end up on a block list due to your email activity, you will be solely responsible for resolving that and/or improving your IP's reputation. Please use your service responsibly.