This answer is simple, some Internet Service
Providers block using other servers to send emails, the simple fix for this
problem would be to contact your internet service provider and ask them what
out-going email server they use then in outlook or whatever program you are
using replace the out-going server "mail.maidsusa.com" with your internet
service providers out-going server Example: mail.optonline.net
Note: only replace the out-going server not the
SMTP Server