I am running nginx 1.1.19 on an Ubuntu 12.04.4 64but server.
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. 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)
server and then closes the connection immediately. The following is a
transcript of the telnet session:
- OK IMAP4 ready
a1 LOGIN [email protected] password
- CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN
X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH
a1 OK [email protected] first_name Last_name authenticated (Success)
Connection closed by foreign host.
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
MOVE CONDSTORE ESEARCH
a1 OK [email protected] Test User authenticated (Success)" while reading
response from upstream,…
It appears to not like google’s CAPABILITY line. Is it too long? Any
Other connections through nginx/stunnel to exchange work just fine.
Posted at Nginx Forum: