outlook old TLS

daemoncesar

• May 04, 2020 08:02

I looked for everything. My server does not accept old outlook

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  GOT

  • May 04, 2020 13:04

  Yes you would need to enable SSLv3 in dovecot and exim to allow old Outlook programs to connect.

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  vacancy

  • May 04, 2020 13:22

  Whm > Exim Configuration Manager > Security Allow weak SSL/TLS ciphers > On Require clients to connect with SSL or issue the STARTTLS command before they are allowed to authenticate with the server > Off Options for OpenSSL change > +no_sslv2 +no_sslv3 SSL/TLS Cipher Suite List change > ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA Save changes.

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  cPanelLauren

  • May 04, 2020 20:02

  Really old Outlook doesn't use TLS but SSLv3 - if it's that instance @GOT would be correct you'd have to allow SSLv3 if you had to accept it. Which I wouldn't recommend. If it's just that it's using an older encryption method that's been deemed weak @vacancy's suggestion would be sufficient. Either way, I'd recommend they use Mozilla Thunderbird which is free and doesn't experience these issues instead of allowing weaker encryption or deprecated protocols.

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