Very long connecting time on first launch
I'm on Thunderbird (128.6.0esr (64-bit)) on Fedora/GNOME. I've noticed, that whenever I launch Thunderbird, it takes several minutes (!) where it says "Connecting to mail.myserver.com" in status. I'm using my own postfix/dovecot server with imap and I don't have this problem on Thunderbird Windows for instance, where it connects right away on startup. After the initial slow connection, it works just fine, when I manually trigger to scan for new messages (instantly). I tried literally any option within Thunderbird to fix that, without any success. It seems to be some trouble with resolving / dns or probably ip6/ip4, but then again, why would it work normally after the long connection time in the beginning? Any clue what might be the problem here?
All Replies (1)
The Problem was caused by Fedoras network configuration. I had to disable IPv6 (rathermore the automatic DNS lookup). You can do that in Fedoras GUI config in the Network section or edit
sudo nano /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1
and apply the changes:
sudo sysctl -p
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