Nginx Mail Library - add support for SSL on the upstream connection side for imap/pop servers

I am looking for a modification of the nginx mail library, I have a rough idea of the areas the code needs to be changed [login to view URL] Currently the mail backend does not support SSL when connecting from nginx itself to imap/pop3 servers, the frontend ssl works perfectly fine. [login to view URL] I will be able to submit an example set of nginx configs for local testing / verification. we want to add optional support for SSL on the mail module. The first part will be here [login to view URL] where we will need to add additional support for the http_auth part to give a variable to let nginx know if it needs to use ssl or not. a variable like "Auth-ServerSSL" or similar (there is a different "Auth-SSL" header thats not related, but best to not conflict) That config then gets used in [login to view URL] aka ngx_mail_proxy_init [login to view URL] this is where i believe most of the work will be. here the [login to view URL] code will need to support ssl. The built in http library in nginx will have some code that can be reused / learned from to do similar. Since the nginx module also only accepts IP's for the upstream imap/pop server's it connects to it will need to skip verification of the actual ssl cert. so case NGX_MAIL_POP3_PROTOCOL and NGX_MAIL_IMAP_PROTOCOL are the ones that will be affected. the default case statement will not need to be adjusted. we are happy for you to also publicly request nginx to merge in the code once complete, were not requiring you to, were quite happy to work on a fork, but you may want the additional github history / credit. Here is an example error of what currently happens. [login to view URL] nginx gets stuck in a 1 minute timeout waiting as its not attempting SSL (line 74 in log). It is important that the feature be optional as we have a mix of imap and pop servers which will be going through a single nginx mail instance and some will and wont have SSL required on the backend connection.