I'm having trouble configuring VMail to Email in that I can't tell what or why exactly why this customer's email provider is rejecting the message. Maybe someone can look at the debug system output I have here and give me a hint?
SMTP Response: 220 blnmtdc2svavs.cluster2.bresnan.net ESMTP
To SMTP server: EHLO [188.8.131.52]
To SMTP server: 22 bytes of data
SMTP Response: 250-blnmtdc2svavs says EHLO to 184.108.40.206:1030
SMTP Response: 250-AUTH=LOGIN
SMTP Response: 250-AUTH LOGIN
SMTP Response: 250-STARTTLS
SMTP Response: 250-8BITMIME
SMTP Response: 250-XDUMPCONTEXT
SMTP Response: 250-PIPELINING
SMTP Response: 250 ENHANCEDSTATUSCODES
To SMTP server: STARTTLS
To SMTP server: 10 bytes of data
SMTP Response: 220 continue
To SMTP server: AUTH PLAIN
To SMTP server: 12 bytes of data
Invalid server message: 500 5.5.2 unrecognized command
From the debug this appears to be a current issue we are working on resolving. As a workaround, you can try downgrading to R10.7.1.
My apologies for not getting back to you on this Matt. I was able to get around this problem initially by downgrading to the latest 10.7.x AOS revision. I'll set up a maintenance window with the customer and report back.