Webmail Error 500 - Internal Server Error

markush · 2025-09-27T19:16:17+00:00

Hallo, ich heute meine Community Edition geupdatet, seitdem komme ich nicht mehr ins Webmail rein: Bereits mehrmals neu gestartet und auch einmal herunter...

thilobi

umgfoin
Tried both, no success...
gromox-zcore still can't connect to port 5000:

systemctl status gromox-zcore

● gromox-zcore.service - Gromox zcore service
     Loaded: loaded (/usr/lib/systemd/system/gromox-zcore.service; enabled; preset: enabled)
     Active: active (running) since Wed 2026-04-15 17:43:59 CEST; 3min 53s ago
 Invocation: 3b415a73950347819c46534b8f1a79b0
       Docs: man:zcore(8gx)
   Main PID: 935 (zcore)
      Tasks: 15 (limit: 9527)
     Memory: 4.6M (peak: 5.1M)
        CPU: 146ms
     CGroup: /system.slice/gromox-zcore.service
             └─935 /usr/libexec/gromox/zcore

Apr 15 17:43:59 mail systemd[1]: Started gromox-zcore.service - Gromox zcore service.
Apr 15 17:43:59 mail zcore[935]: gromox-zcore 3.6 (pid 935 uid 0)
Apr 15 17:43:59 mail gromox-zcore[935]: system: maximum file descriptors: 524288
Apr 15 17:43:59 mail gromox-zcore[935]: system: SMTP server is sendmail://localhost
Apr 15 17:43:59 mail zcore[935]: gromox-zcore 3.6 (pid 935 uid 984)
Apr 15 17:43:59 mail gromox-zcore[935]: system: maximum file descriptors: 524288
Apr 15 17:43:59 mail gromox-zcore[935]: system: SMTP server is sendmail://localhost
Apr 15 17:43:59 mail gromox-zcore[935]: ldap_adaptor: default host <ldapi:///>, base <>, #conn=8, mailattr=mail
Apr 15 17:45:28 mail gromox-zcore[935]: exmdb_client: HX_inet_connect to [localhost]:5000: Connection refused

I also tried this:
/usr/share/php-mapi/class.baserecurrence.php

Delete ... in lines 1709, 1734, 1949, they are PHP syntax errors

(seen here: https://community.grommunio.com/d/2313-webmail-error-500-internal-server-error/26)

umgfoin

thilobi gromox-zcore still can't connect to port 5000:

Next guess:
Do you have an exmdb_hosts_allow-directive in exmdb_provider.cfg
if not, try:
exmdb_hosts_allow = ::1 127.0.0.1 ::ffff:127.0.0.1

and restart istore, zcore, http ...

thilobi

umgfoin
...yes 🙂

thilobi

umgfoin
added that in exmdb_provider.cfg ...restarted whole machine, no luck.

I'm still confused about this mapi-header-php-issue:
https://community.grommunio.com/d/2313-webmail-error-500-internal-server-error/26

'cause thats exactly what nginx complains about:

./nginx-web-error.log
2026/04/15 00:30:16 [error] 786#786: *7 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught MAPIException: The operation failed for an unspecified reason in /usr/share/grommunio-web/server/includes/core/class.mapisession.php:624

And I wonder that not more people have this issue wih Debian... It's reproducable. I've tried to set it up from scratch a few times now and always run into this issue... (I use the script https://github.com/eryx12o45/grommunio-setup)

umgfoin

thilobi I'm still confused about this mapi-header-php-issue:

I'm relatively sure, your main issue is gromox-zcore can't connect to port 5000:

Just verified on local Debian 13, here:
if istore (or http if not standalon) is not running:
zcore:
[2026-04-15 18:00:49.947428]: exmdb_client: HX_inet_connect to [localhost]:5000: Connection refused

istore running, but wrong ACL (exmdb_hosts_allow):
[2026-04-15 18:00:50.949221]: exmdb_client: Failed to connect to [localhost]:5000: Access denied

In both cases, the entire php-mapi-stack (gsync, webapp) fails.

Btw. since istore is running standalone, now: Are there similar port-5000-related errors in gromox-http?

thilobi

umgfoin
systemctl status gromox-http shows no errors:

● gromox-http.service - Gromox HTTP service
     Loaded: loaded (/usr/lib/systemd/system/gromox-http.service; enabled; preset: enabled)
     Active: active (running) since Wed 2026-04-15 20:23:46 CEST; 1min 48s ago
 Invocation: 876b4d2a119c40d2a172acc1a7b192c7
       Docs: man:http(8gx)
   Main PID: 947 (http)
      Tasks: 28 (limit: 9527)
     Memory: 60.4M (peak: 61M)
        CPU: 286ms
     CGroup: /system.slice/gromox-http.service
             └─947 /usr/libexec/gromox/http

Apr 15 20:23:46 mail systemd[1]: Started gromox-http.service - Gromox HTTP service.
Apr 15 20:23:46 mail http[947]: gromox-http 3.6 (pid 947 uid 0)
Apr 15 20:23:46 mail gromox-http[947]: system: maximum file descriptors: 524288
Apr 15 20:23:46 mail http[947]: gromox-http 3.6 (pid 947 uid 984)
Apr 15 20:23:46 mail gromox-http[947]: system: maximum file descriptors: 524288
Apr 15 20:23:46 mail gromox-http[947]: ldap_adaptor: default host <ldapi:///>, base <>, #conn=8, mailattr=mail

Did you install Grommunio under Debian 13 from scratch with the Github-Script or is it an older setup you upgraded by and by?

umgfoin

thilobi Did you install Grommunio under Debian 13 from scratch with the Github-Script or is it an older setup you upgraded by and by?

This is a src-build, installed & updated manually - so I do not install any packages, nor has a setup script ever been run on this system.

umgfoin

thilobi systemctl status gromox-http shows no errors:

I have noticed that gromox-http does not immediately establish a connection to exmdb provider (gromox-istore) upon startup, but later when the next request from a client is received.
In other words, the absence of the error message‘exmdb_client: HX_inet_connect to [localhost]:5000: Connection refused’ immediately after startup does not necessarily mean, access to port 5000 via HTTP is nominal. Triggering a request (e.g. start outlook) will clarify this.

Duese6

thilobi
Could it be a rights issue?

thilobi

Duese6
rather not:

ls -l /etc/gromox/
total 56
-rw-r----- 1 grommunio gromoxcf  38 Apr 15 19:05 delivery.cfg
-rw-r----- 1 grommunio gromoxcf  24 Apr 15 19:05 exchange_emsmdb.cfg
-rw-r----- 1 grommunio gromoxcf  24 Apr 15 19:05 exchange_nsp.cfg
-rw-r----- 1 grommunio gromoxcf  24 Apr 15 19:05 exmdb_local.cfg
-rw-r----- 1 grommunio gromoxcf  24 Apr 15 19:05 exmdb_provider.cfg
-rw-r----- 1 grommunio gromoxcf  86 Apr 15 19:24 gromox.cfg
-rw-r----- 1 grommunio gromoxcf 221 Apr 15 19:25 http.cfg
-rw-r----- 1 grommunio gromoxcf 210 Apr 15 19:05 imap.cfg
-rw-r----- 1 grommunio gromoxcf  62 Apr 15 19:05 midb.cfg
-rw-r----- 1 grommunio gromoxcf 128 Apr 15 19:05 mysql_adaptor.cfg
-rw-r----- 1 grommunio gromoxcf 206 Apr 15 19:05 pop3.cfg
-rw-r----- 1 grommunio gromoxcf  53 Apr 15 19:05 smtp.cfg
-rw-r----- 1 grommunio gromoxcf 545 Apr 15 19:05 spamrun.cfg
-rw-r----- 1 grommunio gromoxcf  62 Apr 15 19:05 zcore.cfg

Duese6

@thilobi
In my Debian Quick Install guide (my own notes from January, were I installed my Debain-Test-System), I noted the following.

>gromox-istore is not needed here
systemctl disable --now gromox-istore
systemctl reset-failed gromox-istore

I noticed back then that gromox-istore is/was also disabled on a Grommunio appliance (Leap 15.6). I think it was using port 5000. That caused me some trouble. But don’t hold me to that. It’s worth a try.

umgfoin

Duese6 >gromox-istore is not needed here

A standalone exmdb-provider (gromox-istore) is not mandatory (nor is it the default as of today), but it improves possibilities to isolate problems.
The current implementation terminates the gromox-istore process, if istore_standalone is 0, so even un enabled istore-service should not harm the system in this case as it will quit prior claiming port 5000 with ("istore not enabled (gromox.cfg:istore_standalone). Quitting.")

thilobi

umgfoin
I tried to login to webmail to trigger it, but no error message

crpb

i think you should also be able to trigger the connection via gromox-mbop foreach.mb.here ping or for a single mailbox -u muh@kuh.wiese instead of foreach.*.

thilobi

crpb
...that gives me the familliar

exmdb_client: HX_inet_connect to [localhost]:5000: Connection refused

umgfoin

thilobi I tried to login to webmail

Webapp as a php-mapi-application is the wrong candidate to test gromox-http ...

thilobi ...that gives me the familliar

This confirms, port 5000 is neither accessible from http nor zcore.

I'd try once again:
netstat -tulpe | grep 5000

and

telnet localhost 5000

crpb

I did reproduce it on a test-system where i just did the 15.6->16.0 upgrade.

please paste output of these commands

grep -r -e listen -e istore /etc/gromox
systemctl list-unit-files gromox-istore

i removed all old listen settings and changed to the newer gromox.cfg settings and then it worked again. e.g.

root@grom-test-1:/etc/gromox# grep -r -e listen -e istore /etc/gromox
/etc/gromox/gromox.cfg:http_listen=[::]:10080
/etc/gromox/gromox.cfg:http_listen_tls=[::]:10443
/etc/gromox/gromox.cfg:imap_listen_tls=[::]:993
/etc/gromox/gromox.cfg:pop3_listen_tls=[::]:995
/etc/gromox/gromox.cfg:lda_listen=[::]:24
/etc/gromox/gromox.cfg:istore_standalone=yes
/etc/gromox/http.cfg:#listen_port=10080
/etc/gromox/http.cfg:#listen_ssl_port=10443
/etc/gromox/pop3.cfg:#listen_ssl_port=995
/etc/gromox/smtp.cfg:#listen_port=24
/etc/gromox/imap.cfg:#listen_ssl_port=993

thilobi

crpb

In your post you still have listen entrys in http.cfg. So you removed them?
Since I don't have any...:

grep -r -e listen -e istore /etc/gromox
/etc/gromox/imap.cfg:listen_ssl_port=993
/etc/gromox/gromox.cfg:http_listen     = [::1]:10080
/etc/gromox/gromox.cfg:http_listen_tls = [::1]:10443
/etc/gromox/pop3.cfg:listen_ssl_port=995
/etc/gromox/smtp.cfg:listen_port=24

systemctl list-unit-files gromox-istore
UNIT FILE STATE PRESET

0 unit files listed.

crpb

crpb systemctl list-unit-files gromox-istore

i forgot the .service at the end 🙈

systemctl list-unit-files gromox-istore.service

thilobi

umgfoin

netstat -tulpe | grep 5000
tcp6       0      0 ip6-localhost:5000      [::]:*                  LISTEN      root       5073       926/http

but

telnet localhost 5000
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused

WalterH

port 5000 is used by gromox-http:

ss -tulen | grep 5000
tcp   LISTEN 0      512            [::1]:5000          [::]:*    ino:1162371 sk:2e cgroup:/system.slice/gromox-http.service v6only:1 <->

thilobi

WalterH
same here:

ss -tulen | grep 5000
tcp   LISTEN 0      4096           [::1]:5000          [::]:*    ino:5073 sk:1d cgroup:/system.slice/gromox-http.service v6only:1 <->

umgfoin

WalterH port 5000 is used by gromox-http:

This applies for istore_standalone=0,

For istore_standalone=yes, port 5000 is served by gromox-istore and gromox-http connects to it.
tcp LISTEN 0 4096 [::1]:5000 [::]:* ino:69101613 sk:202e cgroup:/system.slice/gromox-istore.service v6only:

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