great explanation, thanks sam.. great software.. ( puff only bad news for me! industry forced me to upgrade and upgrade a thing that already still works well)
El vie., 4 de oct. de 2019 a la(s) 22:47, Sam Varshavchik ([email protected]) escribió: > > PICCORO McKAY Lenz writes: > > > El vie., 4 de oct. de 2019 a la(s) 21:56, Sam Varshavchik > > ([email protected]) escribió: > > > > > > PICCORO McKAY Lenz writes: > > >> so the solution it's to disable TLS 1.2 ? i'm pretty confused in witch > > > > part of the imapd/imapd-ssl must be done.. > > > > > > The likely problem is that older version of Courier do not support TLS > > > 1.2. > > > There's nothing to disable. Older Debian packages do not even implement > > > it, > > > and modern SSL/TLS clients will only connect to TLS 1.2 peers. > > > > umm, so, modern client only will use TLS? there's t¿other way? > > that's case its only for imap connection. > > Yes, it is expected that all clients, be it IMAP, POP3, and also web > browsers, will at some point will refuse to use anything less than TLS 1.2. > > Web browsers are actually leading in that regard. Firefox/Chrome/Edge have > either completely turned off all support for TLS 1.1 and earlier, or will do > so within a year. > > > for smtp mta are same ? > > For SMTP the situation is more murky. Except in cases of specific > situations, like specific situation of clients using smtps, or requiring the > use of the STARTTLS extension, TLS for SMTP is optional default. With public > MX servers, if the sender is unable to establish a TLS session, for some > reason, most SMTP senders will just fallback to unencrypted connections; > except for very new clients that implement STS. > > The current version of Courier does implement STS on the sending side. So, > with a current default TLS configuration, Courier will refuse to use > anything other than TLS 1.2 to send mail to a domain with a published STS > policy. > > _______________________________________________ > Courier-imap mailing list > [email protected] > Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-imap _______________________________________________ Courier-imap mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-imap
