Hi, maybe you can use a tool with such old clients.
https://www.stunnel.org/platforms.html To have them talk to localhost or another local station and then relay the mail to your postfix with proper encryption. I would not alter my mailserver/MTA to accomodate such outdated clients. Greets, Ludi -----Ursprüngliche Nachricht----- Von: owner-postfix-us...@postfix.org <owner-postfix-us...@postfix.org> Im Auftrag von lst_ho...@kwsoft.de Gesendet: Montag, 14. März 2022 09:12 An: postfix-users@postfix.org Betreff: Re: TLS 1.0 with Outlook 2010 and Windows XP Zitat von Jeroen Geilman <jer...@adaptr.nl>: > Is outlook a requirement? That is easiest to replace with e.g. > thunderbird > To my knowledge the Software is using the old Outlook API because Outlook is used in the background to simply send mail without starting the GUI. But i will double check if Tunderbird would work as default mail app. Thanks Andreas