Hey list, I am experiencing a strange problem where I don't even know where to begin to debug.
I am running my own email server in my office. The server itself works fine. In my office firewall, I have set up DNAT/port forwarding to be able to access the server from outside. With my Android phone and my iPad I have no problems accessing the mails from anywhere, including my home WiFi. However with my iPhone, I have problems accessing my inbox when I am on my home WiFi. The problems only started a few weeks ago, it worked fine for years before. I have not changed any network related settings. Now, when I am on my home WiFi, I cannot use the "pull down to refresh" gesture. It just is not fetching any emails. The automatic sync/fetching is also not fetching the newest emails. Eventually, some emails will come through, but they are from ~6-7 hours ago. Same WiFi as my other devices that work fine. As soon as I disable WiFi on my iPhone and switch to mobile data and do the "pull down to refresh" gesture, all mails from the last 6-7 hours immediately come in. Has anyone ever experienced something like this and can help me analyse the problem? root@mx01:~# uname -a Linux mx01 5.10.0-33-amd64 #1 SMP Debian 5.10.226-1 (2024-10-03) x86_64 GNU/Linux root@mx01:~# cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 11 (bullseye)" NAME="Debian GNU/Linux" VERSION_ID="11" VERSION="11 (bullseye)" VERSION_CODENAME=bullseye ID=debian HOME_URL="https://www.debian.org/"; SUPPORT_URL="https://www.debian.org/support"; BUG_REPORT_URL="https://bugs.debian.org/"; root@mx01:~# dpkg -l dovecot* ||/ Name Version Architektur Beschreibung +++-======================-========================-============-=============================================== un dovecot-abi-2.3.abiv13 <keine> <keine> (keine Beschreibung vorhanden) un dovecot-common <keine> <keine> (keine Beschreibung vorhanden) ii dovecot-core 1:2.3.13+dfsg1-2+deb11u2 amd64 secure POP3/IMAP server - core files un dovecot-gssapi <keine> <keine> (keine Beschreibung vorhanden) ii dovecot-imapd 1:2.3.13+dfsg1-2+deb11u2 amd64 secure POP3/IMAP server - IMAP daemon un dovecot-ldap <keine> <keine> (keine Beschreibung vorhanden) ii dovecot-lmtpd 1:2.3.13+dfsg1-2+deb11u2 amd64 secure POP3/IMAP server - LMTP server un dovecot-lucene <keine> <keine> (keine Beschreibung vorhanden) ii dovecot-managesieved 1:2.3.13+dfsg1-2+deb11u2 amd64 secure POP3/IMAP server - ManageSieve server un dovecot-mysql <keine> <keine> (keine Beschreibung vorhanden) un dovecot-pgsql <keine> <keine> (keine Beschreibung vorhanden) un dovecot-pop3d <keine> <keine> (keine Beschreibung vorhanden) ii dovecot-sieve 1:2.3.13+dfsg1-2+deb11u2 amd64 secure POP3/IMAP server - Sieve filters support un dovecot-solr <keine> <keine> (keine Beschreibung vorhanden) un dovecot-sqlite <keine> <keine> (keine Beschreibung vorhanden) un dovecot-submissiond <keine> <keine> (keine Beschreibung vorhanden) Thanks! Cheers, Simon
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