Hi, I have recently updated to the latest version of Smartermail and one of my customers is unable to email one of their customers. The key bit of the log at my end is:

[2017.01.16] 12:36:31 [02042] CMD: STARTTLS
[2017.01.16] 12:36:31 [02042] RSP: 220 2.0.0 Ready to start TLS
[2017.01.16] 12:36:31 [02042] CMD: EHLO [my mailserver name]
[2017.01.16] 12:36:31 [02042] RSP: 500 5.5.1 Command unrecognized: ""
[2017.01.16] 12:36:31 [02042] CMD: HELO [my mailserver name]
[2017.01.16] 12:36:32 [02042] RSP: 500 5.5.1 Command unrecognized: "HLO  [my mailserver name]"
[2017.01.16] 12:36:32 [02042] CMD: QUIT
[2017.01.16] 12:36:32 [02042] RSP: 500 5.5.1 Command unrecognized: ""

 

Before this bit everything seemed to be going along as normal with all the happy handshaking you might imagine. I don't know if this is to do with SSL ciphers (recently locked down), the recipient mailserver version (Icewarp 9.4.2), Smartermail or a combination of all of them. Any suggestions most welcome!