No Log Error. No Fatal Error log. No Core Dump It's not RAM or HW problem. It's XMAIL internal issue, because when I switch to stunnel, all problems solved. And then when I test K9-MAIL with XMAIL+STUNNEL, K9 Client will not have any JAVA somethings Exception Error
Two tests 1. Very Important Thing in Xmail 1.27 Native SSL If the emailbox has many emails such as 10000, Microsoft Outlook with SSL or NON-SSL download them, it WILL NOT have this issue. Some Tencent Foxmail for Windows, after finish ssl session, it will take the server be FIN_WAIT2 (some version, not all) But K9-MAIL for Android, Download first 1000, it will appear the error in K9-MAIL randomly. 2. Xmail 1.27 + Stunnel Proxy If the emailbox has many emails such as 10000, Microsoft Outlook with SSL or NON-SSL download them, it WILL NOT have this issue. Some Tencent Foxmail for Windows, after finish ssl session, it WILL NOT have any problem. Server WILL NOT TAKE FIN_WAIT_2 K9-MAIL for Android, Download first 1000, it will NOT DISPLAY any error when it finished download emails. >---- Original Message ---- >From: "U.Mutlu" <um4...@mutluit.com> >To: t...@os.st, "XMail Users Mailing List" <xmail@xmailserver.org> >Sent: Tue, May 26, 2015, 10:11 AM >Subject: Re: [xmail] BUG : XMAIL 1.27 with SSL > >Oversea Site via xmail wrote on 05/25/2015 09:23 PM: >> I found the bug on XMAIL 1.27 with SSL (POP3S is main), SSMTP service maybe >> has a same bug too >> >> 1. it will have too many FIN_WAIT_2 on POP3S with two many requests, It is >> because of some non-popular WINDOWS CLIENT e.g. tencent foxmail , outlook >> will >> not have this issue. >> >> 2. If you're using XMAIL'S internal SSL POP3S with any openssl lib. (tested >> 0.9.8za 1.0.0, tested gcc 4.0.2/4.0.4/4.3.6) and the email account contain >> too >> many emails (1000-2000 emails), the mobile client POP3 such as Samsung >> internal Email Client is using SSL, K9-MAIL on any android devices using SSL, >> some iPhone devices (connect with XMAIL SSL port 995), will not download them >> successfully (Android Error - Java Exception Error) and some >> iPhone device will stuck with it, it will not download all emails >> successfully. But if you disable XMAIL'S internal POP3S with -B- startup >> option, and switch stunnel 5.17 port 995 tunnel to port 110, it will solve >> this problem and kick out FIN_WAIT_2 >> >> ***** stunnel 5.17 config ***** >> [pop3s] >> accept = 995 >> connect = 110 >> cert = /etc/stunnel/stunnel.pem >> *************************** > > >What do the logs (server, client) say about the errors? > >I think you need a faster server HW and/or need to optimize the resources, >for example the number of threads, and possibly also RAM. >An excerpt from the doc: >" >If you have an heavily loaded server remember to setup the best number of >XMAIL threads by specifying the '-Qn nthreads' option (you must do some >tentatives to find the best value for your needs). Also you can limit the >number of SMTP, POP3 and CTRL service threads by specifying the options '-SX >maxthreads', '-PX maxthreads' and '-CX maxthreads'. >" > >If there are mail filters, you can put them into a ramdisk and set PATH >accordingly, or use an absolute path to them. See also XMAIL_TEMP in the doc. > >In task manager / system monitor you can see how the resource usage is, >especially CPU, memory, and network. > >-- >cu >Uenal _______________________________________________ xmail mailing list xmail@xmailserver.org http://xmailserver.org/mailman/listinfo/xmail
