Email was working fine but now cannot send an mail and receive"Cannot send mail the senders address was invalid. Have deleted email account and added on the iPhone but same situation and error message. Therefore help needed. Is it a IOS apple issue or something changed by talktalk as I was orihginally with ntl, then tiscali and now service provided by talktalk but retained my tiscali email. Account workin fine signing in on web and via PC MS Outlook.
I'm pretty sure it'll be the way that the iPhone has set up the mail account. Automatic setup should work but sometimes the iPhone thinks it knows best and inserts the wrong settings. Usually the server name.
But if you take screenshots of the incoming and outgoing server setup, image edit to obscure the first part of your email address and then upload here using the Insert Photos (camera con or picture icon on the mobile browser) above this Reply area then I'll take a look and advise if anything is amiss.