Last modified: 2014-01-03 16:19:13 UTC
Taken from <https://otrs-wiki.wikimedia.org/wiki/OTRS_technical_challenges>. Agents need to be able to change their own email. The functionality obviously exists since admins can do so - it simply needs to be exposed to the agents themselves.
As an OTRS admin, I would advise closing this bug (for now, at least). We would need to re-evaluate whether or not we would want to implement this ability. The linked discussion is outdated and some discussion needs to take place.
Per my comment above.