Is your tiscali mailbox receiving mail and sending mail as normal via the webmail sign in?
Select here: Sign in to TalkTalk Mail
Enter your full TalkTalk Mail tiscali.co.uk email address, select Continue and enter the tiscali.co.uk email password, select Sign in.
Do you get an error message on the iPhone or is this a first time setup you're having trouble with?
I'll provide the TalkTalk guides below but what would really help is for you to take screenshots of the incoming and outgoing server settings on the iPhone, image edit to obscure the first part of your tiscali.co.uk email address and upload here so I can see what you see to check the device(s) is/are set up as expected.
The TalkTalk Mail Support Hub is your go to resource for information, guides and Community support for TalkTalk Consumer home broadband and MailPlus subscribers.
Select here:
TalkTalk Mail Support
TalkTalk Mail help
Using TalkTalk Mail
Email settings and device setup guides for TalkTalk Mail
Setting up TalkTalk email on iPhone
