This week, we have noticed that we are not able to send email.
Here is the log:


* Account 'xxxxxxx@ruggedinbox.com': Connecting to SMTP server: ruggedinbox.com ...
[02:57:22] SMTP< 220 csds.local ESMTP
[02:57:22] ESMTP> EHLO localhost
[02:57:22] ESMTP< 250-csds.local
[02:57:22] ESMTP< 250-8BITMIME
[02:57:22] ESMTP< 250-AUTH PLAIN LOGIN
[02:57:22] ESMTP< 250-XCLIENT NAME HELO
[02:57:22] ESMTP< 250-XFORWARD NAME ADDR PROTO HELO
[02:57:22] ESMTP< 250-ENHANCEDSTATUSCODES
[02:57:22] ESMTP< 250
[02:57:22] ESMTP> STARTTLS
[02:57:22] ESMTP< 500 5.5.1 Error: unknown command
** error occurred on SMTP session
*** Error occurred while sending the message:
500 5.5.1 Error: unknown command
* Account 'xxxxxxx@ruggedinbox.com': Connecting to POP3 server: ruggedinbox.com...
[03:01:44] POP3< +OK Welcome to ruggedinbox.com
[03:01:44] POP3> USER xxxxxxx@ruggedinbox.com
[03:01:44] POP3< +OK
[03:01:44] POP3> PASS ********
[03:01:45] POP3< +OK Logged in.
[03:01:45] POP3> STAT
[03:01:45] POP3< +OK 0 0
[03:01:45] POP3> QUIT
[03:01:46] POP3< +OK Logging out.

Thank you in advance, for your help.