PowerMTA provides the unique features and capabilities required by email service providers and enterprises to maximize the effectiveness of email marketing and customer communications, and to maintain their standing as senders of legitimate mail. 

In order for our users to maximize the capabilities of PowerMTA, various features will be highlighted from time to time. Some featues may require the latest version and build of PowerMTA.

If you need to upgrade your version of PowerMTA and need assistance, contact us at support@port25.com.

PowerMTA users can also find answers to many frequently asked questions in the Port25 Users Forum.

Tip -- Domain Macro Support
Available in Version 3.5 r1 and higher

The problem

I need to apply directives to certain domains and not globally. Specifically, I want to apply GoodMail's Certified Email tokens to only those domains that accept the tokens.

The solution

PowerMTA supports Domain Macros which allow you to specify certain domains and apply directives to only those domains through simple and straightforward macro commands.

By specifying the desired domains in macros, you can group domains together where appropriate and even re-use them for other purposes. For example, AOL domains (aol.com, aim.com, aol.fr, aol.de, etc.) are in the domain-macro "aol" while Yahoo! domains are in the domain-macro "yahoo." Those two domain-macros are then nested in the domain-macro "allgmisps."

The macro "allgmisps" is referenced in the configuration file. The "aol" or "yahoo" macros can be used for other purposes should domain-specific configurations be needed.

For more details and an example of the configuration, registered users can go to the PowerMTA User Forum.