[Users] claws-mail impap-error Port 993 tls on Macos

[Stephan Hesse]

Hi David and Paul,

thank first of all.

I had installed the 'lulu' firewall. There I had allowed claws-mail.
Before I wrote the message I had deactivated lulu to be sure that lulu
does not block anything.

So the Apple firewall as described by David was disabled.

Now I proceeded like this:
- uninstalled lulu
- reboot
- linked the binary from
/usr/local/Cellar/claws-mail/3.19.1/bin/claws-mail to
Applications/claws-mail.

ls -la /Applications

lrwxr-xr-x   1 willi  admin     50  4 Okt 10:13 claws-mail -> 
/usr/local/Cellar/claws-mail/3.19.1/bin/claws-mail

- tested all ports and TLS options again. Still without success.
- disabled the Apple Firewall - also without result!

Here is the TCP dump (imaps-993) from Apple Mail:
sudo tcpdump -i en0 port 993
listening on en0, link-type EN10MB (Ethernet), snapshot length 262144
bytes 10:44:13.294086 IP 172.17.X.Y.49733 > Y.X.36.168.imaps: Flags
[S], seq 3970751483, win 65535, options [mss 1460,nop,wscale
6,nop,nop,TS val 176141709 ecr 0,sackOK,eol], length 0 10:44:13.335748
IP 185.67.36.168.imaps > 172.17.X.Y.49733: Flags [S.], seq 2796434345,
ack 3970751484, win 28960, options [mss 1452,sackOK,TS val 2945273449
ecr 176141709,nop,wscale 7], length 0 10:44:13.335822 IP
172.17.X.Y.49733 > Y.X.36.168.imaps: Flags [.], ack 1, win 45, options
[nop,nop,TS val 176141750 ecr 2945273449], length 0 10:44:13.336649 IP
172.17.X.Y.49733 > Y.X.36.168.imaps: Flags [P.], seq 1:170, ack 1, win
45, options [nop,nop,TS val 176141750 ecr 2945273449], length 169
10:44:13.360175 IP Y.X.36.168.imaps > 172.17.X.Y.49733: Flags [.], ack
170, win 235, options [nop,nop,TS val 2945273479 ecr 176141750], length
0 10:44:13.366133 IP Y.X.36.168.imaps > 172.17.X.Y.49733: Flags [.],
seq 1:1441, ack 170, win 235, options [nop,nop,TS val 2945273484 ecr
176141750], length 1440 10:44:13.366195 IP 172.17.X.Y.49733 >
Y.X.36.168.imaps: Flags [.], ack 1441, win 45, options [nop,nop,TS val
176141781 ecr 2945273484], length 0

With the tcpdump of claws-mail no output comes at all!!!

Conclusion: It does not work yet.

How did you install claws-mail? Is there an alternative to install
claws besides Brew? Do you have any other ideas?

Thanks for more tips!

Best regards
Steffe

Am Tue, 03 Oct 2023 13:17:58 +0000
schrieb "David Fletcher" <David at megapico.co.uk>:

> >Hello community,
> >
> >via homebrew https://formulae.brew.sh/formula/claws-mail i installed
> >claws-mail on my macbook (Ventura). E-Mail sending via smtp-587
> >works, receiving via imaps-993 does not. via tcpdump I proved this
> >to myself. Apple seems to block other email clients except
> >apple-mail and thunderbird. Does anyone know the problem and the
> >solution? I would like to continue using claws-mail. I use
> >claws-mail for 17 years, its great and I would like to continue
> >using it! 1000 Thanks to all developers!!
> >  
> 
> Hi Steffe,
> 
> Did you add Claws Mail to the firewall exceptions list? See the
> attached screen-shot, it should look like this in Advanced Network
> Settings (that's also on Ventura). It's working fine, Apple doesn't
> force you to use their mail client.
> 
> Use the + button at the bottom of the firewall control panel to add
> it if it's not there already. You'll need to point it to the real
> Claws Mail binary (probably /usr/local/bin/claws-mail), not any
> launcher script in the Applications folder.
> 
> Best wishes, David.