# Username mapping for imap/pop **URL:** \ **Category:** NGINX\ **Created:** [January 12, 2014, 11:27pm UTC](https://www.ruby-forum.com/t/username-mapping-for-imap-pop/238472 "2014-01-12T23:27:37Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [January 12, 2014, 11:27pm UTC](https://www.ruby-forum.com/t/username-mapping-for-imap-pop/238472/1 "2014-01-12T23:27:37Z")
I need to map from username to login name where I wish to map from just username to removed\_email\_address@domain.invalid for gmail and windomain\username for an exchange server. Is there a way for me to build in hooks to change the username before connecting. I can to that in my mailauth.pm module but don’t know how to return the updated username. Posted at Nginx Forum: > **[username mapping for imap/pop](https://forum.nginx.org/read.php?2,246296,246296#msg-246296)** > > I need to map from username to login name where I wish to map from just username to username@domain.org for gmail and windomain\\username for an exchange server. Is there a way for me to build in hooks to change the username before connecting. I can... ---
**Author:** ![bidwell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e79b87/32.png) [@bidwell](https://www.ruby-forum.com/u/bidwell)\ **Post date:** [January 13, 2014, 8:58am UTC](https://www.ruby-forum.com/t/username-mapping-for-imap-pop/238472/2 "2014-01-13T08:58:59Z")
On Jan 13, 2014, at 2:27 , bidwell wrote: > I need to map from username to login name where I wish to map from just > username to removed\_email\_address@domain.invalid for gmail and windomain\username for an > exchange server. Is there a way for me to build in hooks to change the > username before connecting. I can to that in my mailauth.pm module but > don’t know how to return the updated username. You can return it via header: Auth-User: removed\_email\_address@domain.invalid – Igor S. > **[Advanced Load Balancer, Web Server, & Reverse Proxy - NGINX](https://www.nginx.com/)** > > NGINX accelerates content and application delivery, improves security, and facilitates availability and scalability for the busiest websites on the Internet. ---
**Author:** ![bidwell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e79b87/32.png) [@bidwell](https://www.ruby-forum.com/u/bidwell)\ **Post date:** [January 13, 2014, 6:52pm UTC](https://www.ruby-forum.com/t/username-mapping-for-imap-pop/238472/3 "2014-01-13T18:52:41Z")
Thank you. That is what I thought and have implimented. Tracing the problem further, my imap connection successfully authenticates and then gets a “connection closed by foreign host” going through nginx. The pop connection works just fine, but imap fails. I have nginx configured to enter on port 143 and go out to 127.0.0.1:143 where it goes through stunnel to go to [imap.gmail.com:993](http://imap.gmail.com:993). If I talk directly to 127.0.0.1:143 (to stunnel) it works. If I talk to nginx, it authenticates, logs correct username, target IP and port, gets the Capability list and registers a successful login to the remote (gmail) imap server and then closes the connection immediately. The following is a transcript of the telnet session: telnet nginx:143 - OK IMAP4 ready a1 LOGIN removed\_email\_address@domain.invalid password - CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH a1 OK removed\_email\_address@domain.invalid first\_name Last\_name authenticated (Success) Connection closed by foreign host. Any suggestions as to what to try next to diagnose this? (Thanks in advance) Posted at Nginx Forum: > **[Re: username mapping for imap/pop](https://forum.nginx.org/read.php?2,246296,246341#msg-246341)** > > I need to map from username to login name where I wish to map from just username to username@domain.org for gmail and windomain\\username for an exchange server. Is there a way for me to build in hooks to change the username before connecting. I can... ---
**Author:** ![bidwell](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e79b87/32.png) [@bidwell](https://www.ruby-forum.com/u/bidwell)\ **Post date:** [January 14, 2014, 10:56pm UTC](https://www.ruby-forum.com/t/username-mapping-for-imap-pop/238472/4 "2014-01-14T22:56:04Z")
My nginx error.log shows the following: _5 upstream sent invalid response: "_ CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH a1 OK removed\_email\_address@domain.invalid Test User authenticated (Success)" while reading response from upstream,… It appears to not like google’s CAPABILITY line. Is it too long? Any suggestions? Posted at Nginx Forum: > **[Re: username mapping for imap/pop](https://forum.nginx.org/read.php?2,246296,246442#msg-246442)** > > I need to map from username to login name where I wish to map from just username to username@domain.org for gmail and windomain\\username for an exchange server. Is there a way for me to build in hooks to change the username before connecting. I can...