Iphone SMTP Issues with Apple 10.6 server.

Question

Hi!
I use multiple iphones and blackberries at my place of employment. On the iPhones, sometimes we get errors on sending email, the error saying "The recipient "......@...." was rejected by the server because it does not allow relaying".
I am wondering if this has something to do with the provider cell network. I say this because this is not a constant, dependable, consistent error. Additionally, I have multiple authentication methods set up on the server, and changing around the configuration (ie turn ssl off, change from md5 to password) etc will get the phone to work. Then you can change config back to what it was and it will work as well.
Right now I have 2 iphones, configured exactly the same for SMTP, 1 phone approx 1 mile away from where mine is. My phone works, the other does not. I am waiting for the user to bring his phone to me so I can do a side by side comparison.
BTW this is in Vermont and Edge is a Rampant disease here......(IE we are on edge more than 3G)

Answer 1

Allan,
I am not sure that I dont allow that, IE im not sure where to set that(this is for allowing an employee to use a personal account through the authenticated SMTP of the company server). I thought as long as the user was authenticating through SMTP, which IS required, then it would in fact allow you to send whether using a personal or company.
These security settings, for me, were set up out of the box, for the most part and have been pretty happy with the security level. I used common sense and logic when configuring my first Apple mail server, however I would have to go through it again and be more diligent about documenting in order to tell you what I set everything to. I had some help from Apple Support.
Anyway im not sure what the personal accounts settings are, we DO allow employees to set up their own accounts, as long as they provide the configuratiuon and can set up themselves.
This particular case seems to be more user created, not server side issue.
To re-iterate, no relaying here. I send emails to Comcast regularly abuse@ to tell them to stop allowing their business accounts in the US to blast out spam....