About the Return-Path header

The most common error senders make is adding a Return-Path header to their mail. Even some well known mail software does this. Probably written by programmers who copy from others rather than reading RFCs (the internet standards that specify SMTP and MIME). What does the standard say about Return-Path? The following fragment is from RFC […]

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Categories: General

Interspire bounce processing add-on for PowerMTA

Interspire is perhaps the most popular email marketing tool. Used with PowerMTA, it becomes a powerful and complete email solution. But the two were not integrated with regard to bounce processing. Until now. Postmastery regularly set up turn-key email systems based on Interspire and PowerMTA. The systems were complemented by a POP/IMAP server so bounce […]

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Categories: PowerMTA

DKIM recipe for PowerMTA

DomainKeys, and it’s successor DKIM, are important email authentication techniques. Based on cryptography, they are more secure than SPF and Sender ID. With DomainKeys/DKIM the integrity of the content is also protected and authentication does not break when emails are being forwarded. DomainKeys/DKIM is used by large webmail providers such as Google, Yahoo and AOL. […]

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Categories: General, PowerMTA