Editors note: There was a previous last call on in May 2024 in which a lot of people mentioned that the Security Considerations are currently lacking wrt what channel binding methods are recommended. The XEP has not been updated since. On Tue, Oct 14, 2025 at 9:21 AM Daniel Gultsch <daniel@gultsch.de> wrote:
This message constitutes notice of a Last Call for comments on XEP-0440.
Title: SASL Channel-Binding Type Capability Abstract: This specification allows servers to annouce their supported SASL channel-binding types to clients.
URL: https://xmpp.org/extensions/xep-0440.html
This Last Call begins today and shall end at the close of business on 2025-10-28.
Please consider the following questions during this Last Call and send your feedback to the standards@xmpp.org discussion list:
1. Is this specification needed to fill gaps in the XMPP protocol stack or to clarify an existing protocol?
2. Does the specification solve the problem stated in the introduction and requirements?
3. Do you plan to implement this specification in your code? If not, why not?
4. Do you have any security concerns related to this specification?
5. Is the specification accurate and clearly written?
Your feedback is appreciated!