matrix-org / matrix-org/matrix-bifrost
XMPP -> Matrix doesn't work when the MXID has capital letter
Nobody has claimed this yet.
- Dominant language
- TypeScript
- Stars
- 187
- Forks
- 38
- PR merge metrics
- No merged PRs in 30d
Description
**Describe the bug**
Matrix users whose MXID contains a capital letter (from time before that became disallowed) cannot be messaged from XMPP as [according to Maranda](https://matrix.to/#/!vKsKNErebdRaQvsUkQ:half-shot.uk/$EcFy5T6NfW0yJ89EVAsvVH8vHl_omwICsFYgVdtRdr4?via=half-shot.uk&via=matrix.org&via=libera.chat):
> You can't have caps in a JID that's against the prep profile so XMPP servers will normalize that
**To Reproduce**
1. Send a message from XMPP to a Matrix user e.g. [Ciblia_matrix.org@matrix.org](xmpp:Ciblia_matrix.org@matrix.org)
2. The message never arrives.
**Expected behavior**
The messages go through and I can read them at Matrix.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the XMPP-to-Matrix message failure with the capitalized MXID Ciblia_matrix.org@matrix.org, then trace the bridge's XMPP address normalization and Matrix delivery path. Confirm the fix by showing that messages to legacy Matrix users with capital letters are delivered and readable in Matrix.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- backend, networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100