iPhone 4 and 4S

[Nige-RES]

Recently upgraded phones for our business from blackberry to iphone4. Have synched all our contacts and have set-up email accounts. All went surprisingly well. Emails are being received on the iphone but when sending from any account on the iphone a pop up dialogue box advises "A copy has been placed in your Outbox. The sender address me@mycompany.com was rejected by the server."

The messages do however send immediately when WiFi is activated, please help!

[kids]

It may be dependant on who your email provider is as some will not permit email to be sent unless connected to their own Broadband service .

For instance in my own case my  Broadband provider is Virgin Media, I can receive email from my VM account wherever I am but can only send email from my iPhone if I am connected to a VM wi-fi connection. They do this to stop spamming. If I try to send mail through my VM address when not connected to their service it is placed in my Outbox and sends when a VM connection is made.

Whereas with my Hotmail account I can send and receive email from anywhere (providing I have a signal).

This may not be relevant in your case but it is worth checking your Email provider's policy on sending mail when not connected to their own Broadband service.

[Nige-RES · Accepted solution]

Thanks for the advice Kids

I contacted my ISP to determine what the problem may be turns out they know nothing about it...

Then called Vodafone customer service and went through the options on there for "If you are having issues using a function on your phone" press a number. I finally spoke to a veery helpful lady who advised that it is best to set up a Vodafone 360 account and once this has been registered and verified check the outgoing server settings on the iphone...

>Settings

>Mail, Contacts, Calendars

Choose a mail account, scroll to Outgoing Mail Server

>Outgoing Mail Server

>Add Server...

Enter the following

>Host Name smtp.360.com

>User Name vodafone360username

>Password vodafone360password

ensure settings of server are:

Use SSL ON

Authentication Password

Server Port 465

Then test by sending an email from your phone this should go over the cellular network no problems.