If it fails, then the overall message parse attempt fails out, but we want to allow operating on the borked message at some basic level. This commit adjusts the logic to assume reasonable fallback values in case the various `Content-XXX` header parsing fails, and to defer eg: detection of an unsupported charset until the point where the content conversion is attempted. The invalid headers are recorded as a new INVALID_MIME_HEADERS conformance flag which causes check_fix_conformance to decide that the message needs to be rebuilt. The rebuild process will come up with its own Content-XXX headers for the rebuilt message through its existing logic.
KumoMTA
KumoMTA is an open-source Message Transfer Agent (MTA) designed for high-performance outbound email functionality, similar to commercial enterprise MTAs such as Momentum, PowerMTA, and Halon.
The KumoMTA project was founded by a group of email industry veterans with decades of experience building and managing high-performance On-Prem MTAs and is supported by a community of some of the largest senders in the world.
Because it is designed for high-performance sending environments, KumoMTA is for experienced email operations professionals who are accustomed to high-performance sending environments and familiar with DevOps practices.
Learn more in our FAQ and at https://kumomta.com/.
Documentation
You can learn more about KumoMTA from the Documentation.
Community
Real-time discussion is available on Our Discord.
Developers
If you are interested in contributing/extending KumoMTA, take a look at DEVELOPERS.md. The #devel channel on Our Discord is for contributors to discuss KumoMTA development.
Reporting Bugs
See How to Report Bugs.
Getting Help
See How to Get Help. Issues are for features and bugs only, any help requests posted to Issues will be closed. For paid support see https://kumomta.com/support.
Getting Updates
You can subscribe to updates at https://kumomta.com/subscribe, we send updates periodically and will never sell nor share your information.
Talk to Us
We're available to talk about the project, book us at https://cal.com/team/kumomta/talk-with-kumomta.