Mail Relay with SSL not working

Hi all !
Just started playing with the axigen free edition for private use.
So far i used to use a 10 year old version of Kerio but that is history.

the actual domain is hosted by my provider. i use the email server to collect a lot of free email accounts and push those to my 3 outlook users in the family.

i send emails out via relay. for now thats is mailjet.

my problem:

un the advanced routing tab where i configure the smart host it looks like above.
as soon as i turn on SSL though, i cant send mails anymore.

originally i wanted to send through my provider and then switched to mailjet. both ways run into an SSL error.
So i am very sure its a layer 8 error ( read as: my error). But i am stumped as to what.

Maybe someone can point me into the right direction ?
Thanks a lot.

Hi
For this purpose you need to know which type of encryption is supporting by your provider?

Hello KG,

Could you please share the value for Outgoing delivery settings > Connection settings > Use cipher suite as it is not present in your capture.

If there is any empty value or none please change it to ECDHE-RSA-AES128-SHA256:AES128-GCM-SHA256:RC4:HIGH:!MD5:!aNULL:!EDH and let us know if the problem still persist.

Also, please change DH (Diffie-Helman) parameter file from none to axigen_dh.pem.

From our side we have detected the following ciphers accepted by in-v3.mailjet.com on port 587:

ssl3:   -
tls1:   ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-RSA-CAMELLIA256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-SHA:DHE-RSA-SEED-SHA:DHE-RSA-CAMELLIA128-SHA:AES256-SHA:CAMELLIA256-SHA:AES128-SHA:SEED-SHA:CAMELLIA128-SHA
tls1_1: ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-RSA-CAMELLIA256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-SHA:DHE-RSA-SEED-SHA:DHE-RSA-CAMELLIA128-SHA:AES256-SHA:CAMELLIA256-SHA:AES128-SHA:SEED-SHA:CAMELLIA128-SHA
tls1_2: ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES256-CCM8:DHE-RSA-AES256-CCM:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-CCM8:DHE-RSA-AES128-CCM:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES256-SHA256:ECDHE-RSA-CAMELLIA256-SHA384:DHE-RSA-CAMELLIA256-SHA256:ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:ECDHE-RSA-CAMELLIA128-SHA256:DHE-RSA-CAMELLIA128-SHA256:ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-RSA-CAMELLIA256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-SHA:DHE-RSA-SEED-SHA:DHE-RSA-CAMELLIA128-SHA:AES256-GCM-SHA384:AES256-CCM8:AES256-CCM:AES128-GCM-SHA256:AES128-CCM8:AES128-CCM:AES256-SHA256:CAMELLIA256-SHA256:AES128-SHA256:CAMELLIA128-SHA256:AES256-SHA:CAMELLIA256-SHA:AES128-SHA:SEED-SHA:CAMELLIA128-SHA
tls1_3: -

HTH,
Ioan