Date: Thu, 28 Aug 2025 17:16:09 +0200 From: A FreeBSD User <freebsd@walstatt-de.de> To: FreeBSD CURRENT <freebsd-current@freebsd.org>, FreeBSD Ports <freebsd-ports@freebsd.org> Subject: mail/claws-mail: IPv6 issues: SSL handshake error Message-ID: <20250828171636.04a61a93@thor.sb211.local>
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[-- Attachment #1 --] Hello, I'm using mail/claws-mail for my daily work with FreeBSD (CURRENT, 14-STABLE at this time). After switching to a working IPv6 environment I face serious connection problems with one of my providers, to which claws-mail prefereably connects via IPv6. Sending and receiving is done via "Use TLS" on sending an receiving (the provider, goneo.de has a dedicated introduction configuring claws-mail I followed step by step). On the firewall I observe that the provider in question is connected via IPv6, while other providers, University and others, are not, they are still with IPv4 and do not show any issues. claws-mail provides a log screen, but I can not make much out of it, the SMTP and/or IMAP server is connected at the correct port and the initial handshake seems all right, but in 8 out of 10 times the connection fails and does not get initialized due to a "TLS handshake error". Sending emails takes sometimes 10 attempts, but then of a sudden it works flawlessly! After running claws-mail for a couple of minutes a day, this problem seems to go away in a mysterious way, receiving/sending works like a charm as nothing has ever been broken before ... I;m floating here like a dead man in the water. The firewall / router is FreeBSD / ipfw, I suspected this instance, but why should mail being blocked/corrupted while other connections via IPv6 work? Maybe someone has some ideas what to check and where to look ... Thanks in advance, oh -- A FreeBSD user [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iHUEARYKAB0WIQRQheDybVktG5eW/1Kxzvs8OqokrwUCaLBy1AAKCRCxzvs8Oqok r76zAQDMseQZmJqwrmmugEIkbsI2ZDifUiHoBAHxMlk0vpHTeQD/caw/LSIHUcOw 9j9Qz1Y1daex67BuyFpV6dVOsSsIXg4= =/cvX -----END PGP SIGNATURE-----home | help
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