We regularly review the standards supported by our network. As part of our latest review we have decided to remove support for the following protocols as they are no longer considered secure by industry:
TLS v1.0/v1.1 SSLv2/SSLv3
The only protocols which should now be used are TLS v1.2 or v1.3.
In addition, there are concerns with the following cyphers, which also will not be supported:
DES/RC2/RC3 ciphers
We will start removing support for these protocols from mail servers and other authentication systems as of June 1st 2019