Grandstream Support is saying that the GDS3710 is ONLY compatible with Gmail and that it is not designed to be compatible with any other mail server. This is hard to believe and/or accept.
Grandstream Support is also saying that the “Sender User Name” and the “From Email Address” MUST be the same and that the User Name for authentication CANNOT be different from the sender email address; this is a problem for corporate email systems where the account name and the email addresses are not necessarially identical.
Grandstream Support also says that there are no long files or debugging information available as to why the SMTP emails are not being sent out. (Clicking “Email test” displays an error that merely says “invalid Response”.
Basically, I am being told that the GDS3710 is not compatible with any corporate email systems unless you are lucky, and that there is no support, no diagnostics, and only limited compatibility with any corporate email system.
I find this very hard to believe that Grandstream has such severe limitations and/or crappy software and that there isn’t any attempt to make the GDS3710 compatible with SMTP other than Gmail.
At a very minimum, these limitations should be documented in the user manual (and they are not).
Really, is the product this bad/limited?