IMAP broken again for specific client application

Sstefan_o · Nov 24, 2023

Hello,
since the update a few days ago IMAP is broken again for a specific client application. It is not able to retrieve or store emails. I disabled encryption and and was able to capture the communication with WireShark, this it what it looks like. At some point the server just sends a packet without payland and doesn't respond to the request:

C: (no payload)
S: (no payload)
C: (no payload)
S: * OK [CAPABILITY IMAP4rev1 XLIST SPECIAL-USE UNSELECT UIDPLUS IDLE AUTH=LOGIN LITERAL+ LITERAL-] Service ready
C: 0001 CAPABILITY
S: * CAPABILITY IMAP4rev1 XLIST SPECIAL-USE UNSELECT UIDPLUS IDLE AUTH=LOGIN LITERAL+ LITERAL-
   0001 OK CAPABILITY completed
C: 0002 LOGIN mail@domain.tld password
S: 0002 OK logged in
C: 0003 CAPABILITY
S: * CAPABILITY IMAP4rev1 XLIST SPECIAL-USE UNSELECT UIDPLUS IDLE AUTH=LOGIN LITERAL+ LITERAL-
   0003 OK CAPABILITY completed
C: 0004 LIST "" "*"
S: * LIST (\HasNoChildren) "/" "INBOX"
   * LIST (\HasChildren) "/" "Gel&APY-schte Elemente"
   * LIST (\HasNoChildren) "/" "Gel&APY-schte Elemente/Archiv 2021"
     (...)
   0004 OK LIST completed
C: 0005 SELECT INBOX
S: * 25 EXISTS
   * 12 RECENT
   * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
   * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft)] limited
   * OK [UNSEEN 25] message 25 is first unseen
   * OK [UIDVALIDITY 13] UIDs valid
   * OK [UIDNEXT 2235] predicted next UID
   * LIST () "/" "INBOX"
   0005 OK [READ-WRITE] SELECT completed
C: 0006 STATUS INBOX (UNSEEN)
S: (no payload)

I don't know what's going wrong here. I tried Thunderbird as another IMAP client, it works fine.
Best regards,
Stefan

Mmwilliams · Nov 27, 2023

stefan_o

Would you be so kind to share your gromox version?

Sstefan_o · Nov 28, 2023

mwilliams
It's broken on:
gromox_2.17.122.6a37e39-1+37.1_amd64
gromox_2.17.125.2ea1677-1+42.1_amd64
I reverted back to this version and it works again:
gromox_2.17.52.22905e7-1+23.1_amd64
Not sure how many there versions have been in between, but these are the ones I tested.

WalterH · Nov 28, 2023

stefan_o Update to grommunio 2.18 and retest.

Jjengelh · Nov 28, 2023

gromox-2.18-29-gc0e36e279

Sstefan_o · Nov 28, 2023

jengelh
Tested this version, still doesn't work. This issue is not fixed.

externa1 · Nov 28, 2023

stefan_o
Can confirm that imap is broken since 2.18 release (also 2.18-29-gc0e36e279) on Mailstore Archiv Software (Login is ok - then gets stuck on reading folder items
Thunderbird works well with imap

rg
Christian

Mmwilliams · Nov 28, 2023

@externa1
@stefan_o

No logs, no help. imaptests run with all green lights, that does not mean there might not still be an issue (as mentioned thunderbird works well, alpine, macOS and even outlook IMAP too (not that anyone wants mac or OL on IMAP). Providing some more information from your side is strongly encouraged if you expect any help.

Mmwilliams · Nov 28, 2023

You did follow this, right? https://community.grommunio.com/d/1323-grommunio-218-release/2

Jjengelh · Nov 28, 2023

gromox-2.18-49-g3f74a39a8

Sstefan_o · Nov 28, 2023

mwilliams
No, all I did is a regular system update with apt. I would have expected (as all other packages do) that if there is something else that has to be done, that I get a prompt for that.

Sstefan_o · Nov 28, 2023

jengelh
Will try that as soon as the Debian builds are ready

WalterH · Nov 29, 2023

If you have IMAP problems, try to add two settings to /etc/gromox/imap.cfg:

context_num = 500
context_max_mem = 4M

And restart IMAP: systemctl restart gromox-imap

externa1 · Nov 29, 2023

With version 2.18.54.50cb286 from today Mailstore Archiv is working again

rg
Christian

Sstefan_o · Nov 30, 2023

Yes, works again. The mmv command did not change anything, that was not the issue, I also did not change anything in the configuration.