In order to fix the recently issue on Outlook express outgoing problem, relates to the following change in cPanel version 66:
Please follow being step to fix it.
Fixed case CPANEL-11108: Remove Triple DES from default cipher suite.
You can browse to "WHM >> Exim Configuration Manager >> Advanced Editor" and change the "tls_require_ciphers" value to the following value that was issued by default in cPanel version 64:
Code:
ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
However, keep in mind this is unsupported and not recommended due to the negative impact on the server's security. Instead, the recommended solution is to upgrade systems using Windows XP to a supported OS (Microsoft no longer provides security updates or technical support for the Windows XP operating system).
If you're on our Managed Service, please submit a ticket to Support and we will fix it for you.
Regards,
Peter Chan
HaBangNet Server Admin Team
http://www.habangnet.com
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