Trust Tunnel

[shaunography 0]

Might be worth considering implementing Trust Tunnel (https://github.com/TrustTunnel/TrustTunnel) from the guys at adguard VPN. Now open source, supposedly looks like https traffic and seems to be fast from the experience I have with their VPN. 

[xEE 0]

Adguard VPN prevents normal email work.
Can't send any letter. outlook gets an error: Task '***.com - Sending' reported error (0x800CCC1 A): 'Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.'

and my host provider says: "Hello, We can confirm that the mail server is functioning correctly. The error 0x800CCC1A indicates that your new VPN is interfering with the secure connection (SSL/TLS handshake) between your email client and the mail server. This issue commonly occurs because many modern VPN services include features such as Security Shields or Mail Protection, which intercept or filter email traffic. Since this appears to be a local configuration issue related to the third-party VPN software, we recommend contacting your VPN provider’s support team. You may inform them that their service is likely blocking or interfering with SMTP traffic, particularly on ports 465 and 587."

no replies for about 1 month from their support

and yes, they're fast...