Question about the mailer

[ubay25]

I have this problem with a particular email address, it doesn't seem to receive any emails from the booking system. Whenever I try to use this email as the main and schedule admin email, whenever a user is created or a booking has been made none of the email notifications are sent to this email. However whenever I try other emails as admin email, it works perfectly.

Now I am quite sure there's nothing wrong with the booking system coz it works fine with other emails, the problem must be with the email system that the mailbox is on and why is it not accepting emails from the booking system.

Now, I want to make sure if you agree with me before I query them. Also do you think it also has something to do with the web host we are using (streamline.net)? But the thing is, as I mentioned, it works with other emails so there should be no fault on my web host.
Any advise you can give me?
Thanks!

[Nick]

I would just try sending an email from a mock up script using php's built in mail() method and see if that works.  It may be as simple as changing the "from" address to avoid making spam filters mad.