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mailcow: dockerized - 🐮 + 🐋 = 💕
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unable to accept invitation bug due to charset_map #5271

Closed pythys closed 1 year ago

pythys commented 1 year ago

Contribution guidelines

I've found a bug and checked that ...

Description

in reference to the issues #540 and #4665 I am unable to accept / reject or do anything with _certain_ invites from _certain_ inviters. I am suspecting that the main reason is encoding of iso-8859-1 from the sender which is causing issues with nginx.

The relevant part of my logs is:

mailcowdockerized-nginx-mailcow-1 | 2023/06/05 08:13:11 [error] 23#23: *11227 no "charset_map" between the charsets "iso-8859-1" and "utf-8" while reading response header from upstream, client: 188.71.214.21, server: HOSTHERE, request: "POST /SOGo/so/taher@pythys.com/Mail/0/folderINBOX/folderreference/31806/3/Untitled-3.ics/accept HTTP/2.0", upstream: "http://172.22.1.248:20000/SOGo/so/taher@pythys.com/Mail/0/folderINBOX/folderreference/31806/3/Untitled-3.ics/accept", host: "HOSTHERE", referrer: "https://HOSTHERE/"

When I further investigated the source of the email itself I saw this very interesting part:

--_000_683843e1ee9f4375b4603411299c35c1EX01gulfinscomkw_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

This is despite the calendar event itself being in UTF-8

--_000_683843e1ee9f4375b4603411299c35c1EX01gulfinscomkw_
Content-Type: text/calendar; charset="utf-8"; method=REQUEST
Content-Transfer-Encoding: base64

So the problem is happening because parts of the email message contain iso-8859-1


### Logs:

```plain text
mailcowdockerized-php-fpm-mailcow-1    | fd4d:6169:6c63:6f77::f -  05/Jun/2023:08:13:10 +0300 "GET /sogo-auth.php" 200
mailcowdockerized-nginx-mailcow-1      | 127.0.0.1 - - [05/Jun/2023:08:13:10 +0300] "GET /sogo-auth HTTP/1.0" 200 658 "https://HOSTHERE/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36"
mailcowdockerized-dovecot-mailcow-1    | Jun  5 08:13:10 986bd4a5a09a dovecot: imap-login: Login: user=<taher@pythys.com>, method=PLAIN, rip=172.22.1.248, lip=172.22.1.250, mpid=2393
mailcowdockerized-nginx-mailcow-1      | 2023/06/05 08:13:11 [error] 23#23: *11227 no "charset_map" between the charsets "iso-8859-1" and "utf-8" while reading response header from upstream, client: 188.71.214.21, server: HOSTHERE, request: "POST /SOGo/so/taher@pythys.com/Mail/0/folderINBOX/folderreference/31806/3/Untitled-3.ics/accept HTTP/2.0", upstream: "http://172.22.1.248:20000/SOGo/so/taher@pythys.com/Mail/0/folderINBOX/folderreference/31806/3/Untitled-3.ics/accept", host: "HOSTHERE", referrer: "https://HOSTHERE/"
mailcowdockerized-nginx-mailcow-1      | 188.71.214.21 - - [05/Jun/2023:08:13:11 +0300] "POST /SOGo/so/taher@pythys.com/Mail/0/folderINBOX/folderreference/31806/3/Untitled-3.ics/accept HTTP/2.0" 500 196 "https://HOSTHERE/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36"
mailcowdockerized-sogo-mailcow-1       | Jun  5 08:13:11 94b729e3fe86 sogod [74]: 188.71.214.21 "POST /SOGo/so/taher@pythys.com/Mail/0/folderINBOX/folderreference/31806/3/Untitled-3.ics/accept HTTP/1.0" 500 196/0 0.190 - - 0 - 14
mailcowdockerized-dovecot-mailcow-1    | Jun  5 08:13:11 986bd4a5a09a dovecot: imap(taher@pythys.com)<2393><r3Z79Vr91JqsFgH4>: Disconnected: Logged out in=268 out=15234 deleted=0 expunged=0 trashed=0 hdr_count=1 hdr_bytes=5932 body_count=1 body_bytes=5634

Steps to reproduce:

- receive a calendar invitation from sender
- click accept or reject
- observe the error logs above

This repeat is only on my side, might be difficult to repeat as I'm not sure what is in the email message that might be the cause.

Which branch are you using?

master

Operating System:

arch linux

Server/VM specifications:

ubuntu server

Is Apparmor, SELinux or similar active?

no

Virtualization technology:

none

Docker version:

Docker version 24.0.2, build cb74dfc

docker-compose version or docker compose version:

Docker Compose version v2.18.1

mailcow version:

2023-05a

Reverse proxy:

none, standard mailcow

Logs of git diff:

--- a/data/conf/postfix/main.cf
+++ b/data/conf/postfix/main.cf
@@ -198,3 +198,6 @@ parent_domain_matches_subdomains = debug_peer_list,fast_flush_domains,mynetworks

 # DO NOT EDIT ANYTHING BELOW #
 # User overrides #
+
+myhostname = HOSTHERE
+
diff --git a/docker-compose.yml b/docker-compose.yml
index a5a8f95b..3c429397 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -582,36 +582,6 @@ services:
           aliases:
             - ofelia

-    ipv6nat-mailcow:
-      depends_on:
-        - unbound-mailcow
-        - mysql-mailcow
-        - redis-mailcow
-        - clamd-mailcow
-        - rspamd-mailcow
-        - php-fpm-mailcow
-        - sogo-mailcow
-        - dovecot-mailcow
-        - postfix-mailcow
-        - memcached-mailcow
-        - nginx-mailcow
-        - acme-mailcow

### Logs of iptables -L -vn:

```plain text
Chain INPUT (policy ACCEPT 27660 packets, 6645K bytes)
 pkts bytes target     prot opt in     out     source               destination
 135K   41M MAILCOW    all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
1000K  405M MAILCOW    all  --  *      *       0.0.0.0/0            0.0.0.0/0
 999K  405M DOCKER-USER  all  --  *      *       0.0.0.0/0            0.0.0.0/0
 999K  405M DOCKER-ISOLATION-STAGE-1  all  --  *      *       0.0.0.0/0            0.0.0.0/0
 820K  370M ACCEPT     all  --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
48205 3058K DOCKER     all  --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0
 131K   32M ACCEPT     all  --  br-mailcow !br-mailcow  0.0.0.0/0            0.0.0.0/0
43365 2788K ACCEPT     all  --  br-mailcow br-mailcow  0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
    0     0 DOCKER     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  docker0 docker0  0.0.0.0/0            0.0.0.0/0

Chain OUTPUT (policy ACCEPT 33850 packets, 4241K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.4           tcp dpt:8983
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.249         tcp dpt:6379
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.7           tcp dpt:3306
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:12345
    5   272 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:4190
   42  2072 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:587
  138  7988 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:995
  245 14472 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:465
 2172  122K ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.10          tcp dpt:443
  272 16056 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:993
   89  4856 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:25
 1355 70670 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.10          tcp dpt:80
  259 15256 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:143
  263 15468 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:110

Chain DOCKER-ISOLATION-STAGE-1 (1 references)
 pkts bytes target     prot opt in     out     source               destination
 131K   32M DOCKER-ISOLATION-STAGE-2  all  --  br-mailcow !br-mailcow  0.0.0.0/0            0.0.0.0/0
    0     0 DOCKER-ISOLATION-STAGE-2  all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0
7979K 2203M RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain DOCKER-ISOLATION-STAGE-2 (2 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DROP       all  --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0
    0     0 DROP       all  --  *      docker0  0.0.0.0/0            0.0.0.0/0
 901K  297M RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain DOCKER-USER (1 references)
 pkts bytes target     prot opt in     out     source               destination
7979K 2203M RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain MAILCOW (2 references)
 pkts bytes target     prot opt in     out     source               destination
  280 16728 REJECT     all  --  *      *       141.98.10.151        0.0.0.0/0            reject-with icmp-port-unreachable

Logs of ip6tables -L -vn:

Chain INPUT (policy ACCEPT 1638 packets, 106K bytes)
 pkts bytes target     prot opt in     out     source               destination
 1638  106K MAILCOW    all      *      *       ::/0                 ::/0

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
 229K  344M MAILCOW    all      *      *       ::/0                 ::/0
 230K  344M DOCKER-USER  all      *      *       ::/0                 ::/0
 230K  344M DOCKER-ISOLATION-STAGE-1  all      *      *       ::/0                 ::/0
 190K  341M ACCEPT     all      *      br-mailcow  ::/0                 ::/0                 ctstate RELATED,ESTABLISHED
39398 2742K DOCKER     all      *      br-mailcow  ::/0                 ::/0
    0     0 ACCEPT     all      br-mailcow !br-mailcow  ::/0                 ::/0
39398 2742K ACCEPT     all      br-mailcow br-mailcow  ::/0                 ::/0
    0     0 ACCEPT     all      *      docker0  ::/0                 ::/0                 ctstate RELATED,ESTABLISHED
    0     0 DOCKER     all      *      docker0  ::/0                 ::/0
    0     0 ACCEPT     all      docker0 !docker0  ::/0                 ::/0
    0     0 ACCEPT     all      docker0 docker0  ::/0                 ::/0

Chain OUTPUT (policy ACCEPT 5754 packets, 732K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::d  tcp dpt:4190
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::e  tcp dpt:587
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::d  tcp dpt:995
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::e  tcp dpt:465
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:443
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::d  tcp dpt:993
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::e  tcp dpt:25
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:80
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::d  tcp dpt:143
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::d  tcp dpt:110

Chain DOCKER-ISOLATION-STAGE-1 (1 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DOCKER-ISOLATION-STAGE-2  all      br-mailcow !br-mailcow  ::/0                 ::/0
    0     0 DOCKER-ISOLATION-STAGE-2  all      docker0 !docker0  ::/0                 ::/0
1225K 1381M RETURN     all      *      *       ::/0                 ::/0

Chain DOCKER-ISOLATION-STAGE-2 (2 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DROP       all      *      br-mailcow  ::/0                 ::/0
    0     0 DROP       all      *      docker0  ::/0                 ::/0
    0     0 RETURN     all      *      *       ::/0                 ::/0

Chain DOCKER-USER (1 references)
 pkts bytes target     prot opt in     out     source               destination
1225K 1381M RETURN     all      *      *       ::/0                 ::/0

Chain MAILCOW (2 references)
 pkts bytes target     prot opt in     out     source               destination

Logs of iptables -L -vn -t nat:

Chain PREROUTING (policy ACCEPT 103K packets, 6961K bytes)
 pkts bytes target     prot opt in     out     source               destination
 104K 5747K DOCKER     all  --  *      *       0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 12757 packets, 638K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 94 packets, 7060 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DOCKER     all  --  *      *       0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT 48066 packets, 3051K bytes)
 pkts bytes target     prot opt in     out     source               destination
47132 3548K MASQUERADE  all  --  *      !br-mailcow  172.22.1.0/24        0.0.0.0/0
    0     0 MASQUERADE  all  --  *      !docker0  172.17.0.0/16        0.0.0.0/0
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.4           172.22.1.4           tcp dpt:8983
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.249         172.22.1.249         tcp dpt:6379
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.7           172.22.1.7           tcp dpt:3306
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:12345
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:4190
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.253         172.22.1.253         tcp dpt:587
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:995
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.253         172.22.1.253         tcp dpt:465
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.10          172.22.1.10          tcp dpt:443
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:993
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.253         172.22.1.253         tcp dpt:25
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.10          172.22.1.10          tcp dpt:80
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:143
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:110

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination
    3   180 RETURN     all  --  br-mailcow *       0.0.0.0/0            0.0.0.0/0
    0     0 RETURN     all  --  docker0 *       0.0.0.0/0            0.0.0.0/0
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:18983 to:172.22.1.4:8983
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:7654 to:172.22.1.249:6379
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:13306 to:172.22.1.7:3306
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:19991 to:172.22.1.250:12345
    5   272 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:4190 to:172.22.1.250:4190
   42  2072 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:587 to:172.22.1.253:587
  138  7988 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:995 to:172.22.1.250:995
 1859  111K DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:465 to:172.22.1.253:465
 2158  121K DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:443 to:172.22.1.10:443
  272 16056 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:993 to:172.22.1.250:993
   89  4856 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:25 to:172.22.1.253:25
 1357 70774 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80 to:172.22.1.10:80
  259 15256 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:143 to:172.22.1.250:143
  263 15468 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:110 to:172.22.1.250:110

Logs of ip6tables -L -vn -t nat:

Chain PREROUTING (policy ACCEPT 21811 packets, 1920K bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DOCKER     all      *      *       ::/0                 ::/0                 ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DOCKER     all      *      *       ::/0                !::1                  ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT 10409 packets, 833K bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 MASQUERADE  all      *      !br-mailcow  fd4d:6169:6c63:6f77::/64  ::/0
    0     0 MASQUERADE  all      *      !docker0  fd00:dead:beef:c0::/80  ::/0
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::d  fd4d:6169:6c63:6f77::d  tcp dpt:4190
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::e  fd4d:6169:6c63:6f77::e  tcp dpt:587
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::d  fd4d:6169:6c63:6f77::d  tcp dpt:995
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::e  fd4d:6169:6c63:6f77::e  tcp dpt:465
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:443
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::d  fd4d:6169:6c63:6f77::d  tcp dpt:993
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::e  fd4d:6169:6c63:6f77::e  tcp dpt:25
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:80
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::d  fd4d:6169:6c63:6f77::d  tcp dpt:143
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::d  fd4d:6169:6c63:6f77::d  tcp dpt:110

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 RETURN     all      br-mailcow *       ::/0                 ::/0
    0     0 RETURN     all      docker0 *       ::/0                 ::/0
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:4190 to:[fd4d:6169:6c63:6f77::d]:4190
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:587 to:[fd4d:6169:6c63:6f77::e]:587
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:995 to:[fd4d:6169:6c63:6f77::d]:995
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:465 to:[fd4d:6169:6c63:6f77::e]:465
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:443 to:[fd4d:6169:6c63:6f77::f]:443
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:993 to:[fd4d:6169:6c63:6f77::d]:993
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:25 to:[fd4d:6169:6c63:6f77::e]:25
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:80 to:[fd4d:6169:6c63:6f77::f]:80
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:143 to:[fd4d:6169:6c63:6f77::d]:143
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:110 to:[fd4d:6169:6c63:6f77::d]:110

DNS check:

151.101.193.69
151.101.129.69
151.101.65.69
151.101.1.69
MAGICCC commented 1 year ago

Seems like a SOGo issue, could you fill in a ticket on their side?

pythys commented 1 year ago

Well, are you sure it's a SOGo issue? from the logs I've provided it seems like the problem is between SOGo and nginx communication isn't it? I'd be happy to report it with SOGo but what would I tell them? That nginx is not happy with a request from SOGo?

pythys commented 1 year ago

closing, difficult to repeat and to reduce the load on open issues