Exim gives a wrong version number error

[MikeMcQ]

@petercooperjr

It does with starttls, which is what the openssl command is using.

I guess I should have been clearer. Are they sure they have configured exim to reply to TLS requests on port 25?

Just setting a cert file name isn't enough. They need the proper TLS Connect configuration: 43. Encrypted SMTP connections using TLS/SSL