You can use 465 smtps port. The shared SSL domain for your account is now 'hoth.nocdirect.com'. To connect to that port, please use shared SSL domain and activate SSL in the email client.
Change the outgoing port number from 25 to 465 and select the checkbox "This server requires an encrypted SSL connection (SSL)" - also change mail server to hoth.nocdirect.com (for outgoing server only).
For MS Outlook:
Tools > Email Accounts > View or change existing account
select the email account and press Change button
Change the outgoing mail server to:
Click on More Settings...
Click on Outgoing Server tab
select "My outgoing server (SMTP) requires authentication"
and keep (o) Use same settings as my incoming mail server
Click on Advanced tab
under Outgoing server (SMTP)
select "This server requires an encrypted connection (SSL)
and change 25 to 465 in front of it.
Press OK and save those settings.
Note: If you get a warning about SSL certificate not being trusted, please ignore that warning or ask the support to update the SSL cert for exim.