XEP-Remarks/XEP-0203: Delayed Delivery
Revision as of 22:48, 4 November 2019 by Zash (talk | contribs) (→Missing from attribute: please also mention the privacy leak)
Multiple delay tags
There are multiple hops involved in delivery of a stanza, multiple points where it may be delayed. It may even be delayed multiple times, e.g. because the users client had to resume their XEP-0198 session and their server took its sweet time to get s2s up and running.
Thus it makes sense to allow multiple delayed delivery payloads on a stanza.
Missing from attribute
A stanza sent without a from attribute implies from=senders full JID. Applying the same to delayed delivery makes sense, ie missing from means that it was the original sender that had a delay.
Including ones own full JID would also be a privacy leak in the context of (semi-)anonymous MUC.