Sending messages

[mark]

I am getting the error :553 Requested action not taken: mailbox name not
allowed or chunk too large.

Please help.

I know the message is not too large because it only includes "test" in the
subject line.

Thanks

 

[Tom Willett]

Are you required to use authentication in the SMTP settings?

:I am getting the error :553 Requested action not taken: mailbox name not
: allowed or chunk too large.
:
: Please help.
:
: I know the message is not too large because it only includes "test" in the
: subject line.
:
: Thanks