# Deliver messages via HTTPS (filtermail-transport)

**URL:** <https://forum.delta.chat/t/deliver-messages-via-https-filtermail-transport/5282>\
**Category:** Chatmail Relays\
**Tags:** open-standards, documentation, censorship, chatmail\
**Created:** [May 19, 2026, 9:51pm UTC](https://forum.delta.chat/t/deliver-messages-via-https-filtermail-transport/5282 "2026-05-19T21:51:38Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![bestman](https://forum.delta.chat/letter_avatar_proxy/v4/letter/b/96bed5/32.png) [@bestman](https://forum.delta.chat/u/bestman)\
**Post date:** [May 19, 2026, 9:51pm UTC](https://forum.delta.chat/t/deliver-messages-via-https-filtermail-transport/5282/1 "2026-05-19T21:51:38Z")

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I’m looking at the latest update, but I’m still unclear on the “Introduce filtermail-transport for delivering messages via HTTPS (SMTP stays as fallback)” scheme. So, does this mean we’re using Nginx on port 443? I’m also curious if this will replace port 25 (federation) in the future?

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