Hi again IMAP Login thankfully works on imaps port 993 with plain SSL.
But now I get the same issue with SMTP. Port 465 which traditionally is used for smtps via plain SSL is closed. Port 587 advertises STARTTLS: Trying 2603:1026:c0b:16::2... Connected to outlook.office365.com. Escape character is '^]'. 220 ZR0P278CA0005.outlook.office365.com Microsoft ESMTP MAIL Service ready at Tue, 18 Jul 2023 14:43:40 +0000 ehlo example.com 250-ZR0P278CA0005.outlook.office365.com Hello [2001:4060:1:4133:9afa:9bff:fe4a:aa55] 250-SIZE 157286400 250-PIPELINING 250-DSN 250-ENHANCEDSTATUSCODES 250-STARTTLS 250-8BITMIME 250-BINARYMIME 250-CHUNKING 250 SMTPUTF But same as on the IMAP port, after issuing STARTTLS no more communication is possible. Can be checked with openssl: $ openssl s_client -starttls smtp -connect outlook.office365.com:587 Cert Validation works, but then the Server is silent and does not accept any SMTP commands. Same on port 25 btw, which is blocked by many ISP. But wait, hotmail hopefully also uses TLS for emails from server to server. STARTTLS should still be working there... $ openssl s_client -starttls smtp -connect hotmail-com.olc.protection.outlook.com:25 Same issue, checking our mailserver logs if I see anything about STARTLS failing towards Hotmail etc. Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
