I have an issue that was partially solved by you great experts at EE, so I'm hoping for the same results this time out.
I have an Exchange 2003 server. A customer of ours recently told us that they are now requiring all mail to and from us and them to be encrypted.
To address this, I purchased a UCC SSL cert from Go Daddy, and installed it on the Exchange server. I set up a separate SMTP connector in Exchange to pass all mail to this client's specified domain names through it, and set enforcement of SSL encryption. this was the help i got on the last question, and it was great. This part is now working like a champ" All mail being received by them from us is properly encrypted in TLS format.
Now, however, mail they send to us is being rejected for lack of sufficient encryption. I have attached a text file of the errors they are getting when trying to send mail to us.
This is a large client. Help to solve this quickly will be appreciated.