I too receive the message that "The server rejected one of the recipient's addresses. The message has been placed in your Outbox". I have followed many times all the steps mentioned above with no success. The same accounts work perfectly in all my other devices.
Finally it worked! I had to add in the SMTP server the username and the password (which are optional) and to set the authentication to password and I rebooted my phone.
Finally it worked! I had to add in the SMTP server the username and the password (which are optional) and to set the authentication to password and I rebooted my phone.
Good to know, thank you for sharing.
Have you tried to reboot your phone? Or to even uninstall your email app and to reinstall it? One of these two may help.
I have done both, more than once. Nothing changed!
I cannot send emails through my iphone
