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One of my mailbox via IMAP stuck at "Checking mail server capabilities" then timed out

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LunarShaddow
LunarShaddow
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Win10 latest, TB 91.2.0.

Server info: IMAP: mail.fudan.edu.cn:993, TLS SMTP: mail.fudan.edu.cn:465, TLS

I tried "set MOZ_LOG=IMAP:5,timestamp" but cannot see any output.

IMAP connect via openssl s_client seems OK. TLS version is 1.2.

$ openssl s_client -crlf -connect mail.fudan.edu.cn:993 CONNECTED(00000003) depth=2 C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority verify return:1 ... --- SSL handshake has read 5376 bytes and written 435 bytes Verification: OK --- New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384 Server public key is 2048 bit ... ---

  • OK Coremail System IMap Server Ready(fudan.edu.cn[f16f85d74eec5537c06c06caf66bbcbf])

a001 CAPABILITY

  • CAPABILITY IMAP4rev1 XLIST SPECIAL-USE ID LITERAL+ STARTTLS ENABLE UTF8=APPEND UTF8=USER UTF8=ALL

a001 OK CAPABILITY completed a002 LOGIN chenchen20@fudan.edu.cn PASSWORDHERE a002 OK LOGIN completed a003 list "" "*"

  • LIST () "/" "INBOX"
  • LIST (\Drafts) "/" "Drafts"
  • LIST (\Sent) "/" "Sent Items"
  • LIST (\Trash) "/" "Trash"
  • LIST (\Junk) "/" "Junk E-mail"
  • LIST () "/" "Virus Items"

a003 OK LIST Completed


I can also successfully send email via SMTP (smtps) via TB.

I can provide a temporary password to who wish to debug.

Win10 latest, TB 91.2.0. Server info: IMAP: mail.fudan.edu.cn:993, TLS SMTP: mail.fudan.edu.cn:465, TLS I tried "set MOZ_LOG=IMAP:5,timestamp" but cannot see any output. IMAP connect via openssl s_client seems OK. TLS version is 1.2. $ '''openssl s_client -crlf -connect mail.fudan.edu.cn:993''' CONNECTED(00000003) depth=2 C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority verify return:1 ... --- SSL handshake has read 5376 bytes and written 435 bytes Verification: OK --- New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384 Server public key is 2048 bit ... --- * OK Coremail System IMap Server Ready(fudan.edu.cn[f16f85d74eec5537c06c06caf66bbcbf]) '''a001 CAPABILITY''' * CAPABILITY IMAP4rev1 XLIST SPECIAL-USE ID LITERAL+ STARTTLS ENABLE UTF8=APPEND UTF8=USER UTF8=ALL a001 OK CAPABILITY completed '''a002 LOGIN chenchen20@fudan.edu.cn PASSWORDHERE''' a002 OK LOGIN completed '''a003 list "" "*"''' * LIST () "/" "INBOX" * LIST (\Drafts) "/" "Drafts" * LIST (\Sent) "/" "Sent Items" * LIST (\Trash) "/" "Trash" * LIST (\Junk) "/" "Junk E-mail" * LIST () "/" "Virus Items" a003 OK LIST Completed I can also successfully send email via SMTP (smtps) via TB. I can provide a temporary password to who wish to debug.

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LunarShaddow
LunarShaddow Question owner
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I managed to generate logs.

2021-10-21 07:28:08.533000 UTC - [Parent 9812: IMAP]: D/IMAP Trying auth method 0x4 2021-10-21 07:28:08.537000 UTC - [Parent 9812: IMAP]: D/IMAP got new password 2021-10-21 07:28:08.537000 UTC - [Parent 9812: IMAP]: D/IMAP IMAP: trying auth method 0x4 2021-10-21 07:28:08.537000 UTC - [Parent 9812: IMAP]: D/IMAP old-style auth 2021-10-21 07:28:08.537000 UTC - [Parent 9812: IMAP]: I/IMAP 233e51bd800:mail.fudan.edu.cn:NA:SendData: Logging suppressed for this command (it probably contained authentication information) 2021-10-21 07:28:08.543000 UTC - [Parent 9812: IMAP]: D/IMAP ReadNextLine [rv=0x0 stream=233eaa02430 nb=23 needmore=0] 2021-10-21 07:28:08.548000 UTC - [Parent 9812: IMAP]: D/IMAP ReadNextLine [rv=0x0 stream=233e6eedd30 nb=23 needmore=0] 2021-10-21 07:28:08.548000 UTC - [Parent 9812: IMAP]: I/IMAP 233e51bd800:mail.fudan.edu.cn:NA:CreateNewLineFromSocket: 93 OK LOGIN completed

2021-10-21 07:29:13.379000 UTC - [Parent 9812: Main Thread]: D/IMAP proposed url = INBOX folder for connection has To Wait = true can run = false 2021-10-21 07:29:13.379000 UTC - [Parent 9812: Main Thread]: I/IMAP queuing url:imap://chenchen20@fudan.edu.cn@mail.fudan.edu.cn:993/folderstatus>^INBOX 2021-10-21 07:29:13.379000 UTC - [Parent 9812: Main Thread]: I/IMAP considering playing queued url:imap://chenchen20@fudan.edu.cn@mail.fudan.edu.cn:993/folderstatus>^INBOX 2021-10-21 07:29:13.379000 UTC - [Parent 9812: Main Thread]: I/IMAP creating protocol instance to play queued url:imap://chenchen20@fudan.edu.cn@mail.fudan.edu.cn:993/folderstatus>^INBOX 2021-10-21 07:29:13.379000 UTC - [Parent 9812: Main Thread]: D/IMAP proposed url = INBOX folder for connection has To Wait = true can run = false 2021-10-21 07:29:13.379000 UTC - [Parent 9812: Main Thread]: I/IMAP failed creating protocol instance to play queued url:imap://chenchen20@fudan.edu.cn@mail.fudan.edu.cn:993/folderstatus>^INBOX

So something else must went wrong.

PS. I can use this IMAP via Outlook without problems.

Modified by LunarShaddow