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Nov 13, 2025
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docs: document which services are involved in delivering an internal msg #678

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2b3516c
doc: add diagram for internal message
missytake Nov 13, 2025
c552413
doc: apostrophe for clarity
missytake Nov 13, 2025
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18 changes: 18 additions & 0 deletions doc/source/overview.rst
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Expand Up @@ -174,6 +174,24 @@ Component dependency diagram
style nginx-external fill:#fc9;
style nginx-right fill:#fc9;

Message between users on the same relay
---------------------------------------

.. mermaid::
:caption: This diagram shows the path a non-federated message takes.

graph LR;
sender --> |465|smtps/smtpd;
sender --> |587|submission/smtpd;
smtps/smtpd --> |10080|filtermail;
submission/smtpd --> |10080|filtermail;
filtermail --> |10025|smtpd_reinject;
smtpd_reinject --> cleanup;
cleanup --> qmgr;
qmgr --> smtpd_accepts_message;
qmgr --> |lmtp|dovecot;
dovecot --> recipient;
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@hpk42 hpk42 Nov 13, 2025

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for in-relay messages there is no filtermail-incoming?

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@missytake missytake Nov 13, 2025

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No, that is only invoked by the smtpd which is running on port 25. filtermail-outgoing ensures that internal messages are encrypted.

dovecot --> sender's_other_devices;

Operational details of a chatmail relay
----------------------------------------
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