OpenSRS Email Mass Mailing Policy

OpenSRS does not support outbound mass mailing as a standard offering. As standard practice we limit users from sending mail to large numbers recipients per 24 hour period. This limit is restrictive on the first day of usage, and becomes more lenient over time. Users who reach this limit will experience error messages stating "Daily maximum exceeded".

This limit is subject to change without notice, should our service be compromised. In order to protect our customers we do not publish the numeric limit publicly. This restriction can be overridden by our staff if requested by our customer for a temporary period of time. This request will be submitted through the support organization, and each request will be evaluated on a case by case basis.

Policy objectives

The objectives of our mass mailing policy are the following:

Definition of Mass Mailing

"Opt-in" mailings are those email messages that are sent to more than 500 users by either OpenSRS customers or their third party partner to any group of end users. Opt-in means that the end user has signed up for the mailings voluntarily. "Opt-in" implies that the mailings are not Spam.


Spam is defined as "unsolicited bulk email that includes advertisements or solicitations, commercial or otherwise, regardless of content." Without exception, OpenSRS prohibits the practice of mass mailing unwanted email solicitations of any type, regardless of content, and will take action to prevent this practice.

Mass Mailing Requirements


In order to have the sending restrictions lifted for a particular sender: OpenSRS requires 48 hours notice. The following information must be provided to our support team:

Allowable send times: mass mailings must be started and completed between 9pm and 4am US Pacific Time. Valid "From", "Reply-To", "Return-Path" and "Error-To" headers. If the following values are included in your mail header, they must contain valid addresses, and each email address must accept any bounces at the rate that they occur:

Valid "Abuse contact": customers who send or receive mass mailings MUST supply OpenSRS with an emergency abuse contact if there are any problems or complaints associated with the mailing.

Failure to comply with these conditions may result in: