Q: Unable to send and receive btinternet emails via Apple Mail. Keep getting error message " Username or password in valid". Able to connect to email via BT Mail web page. Trouble started with recent upgrade to iOS 7.1.2.

I haven't had any problems with my btinternet account on 7.1.2 - you've tried deleting and adding the account back, using the new BT email settings :

http://bt.custhelp.com/app/answers/detail/a_id/47533/

If you set it up by selecting Yahoo as the account type on the setup screen does that work - I'm not sure if BT have moved all of their accounts off Yahoo yet.

Checked to see whether you are still in Yahoo, or whether you've been migrated over to the new service : http://diagnostics.bt.com/login/?workflow=EmailChecker&s_intcid=helphero_email_c hecker

If you've been migrated then Yahoo possibly won't still work, but the new BT steps should - I've just tried deleting my account and adding it back and those steps work ok. Are you able to add the account using those settings and it's when trying to send/receive emails in the Mail app that you get an error, or is it during the adding of the account ?

If you've been able to add the account with the new set up then tapping on the account in Settings > Mail, Contacts, Calendars and then tapping on the id on the next screen should give you a popup - on that screen I have the Incoming mail 'Host Name' as 'mail.btinternet.com' with my email address and password below it, and the Outgoing SMTP is also 'mail.btinternet.com'. The Advanced button/link below that has 'Use SSL' 'on', Authentication as 'Password', IMAP Path Prefix blank, Server Port 993

iOS: Unable to send or receive email

http://support.apple.com/kb/TS3899

Can’t Send Emails on iPad – Troubleshooting Steps

http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/

Setting up and troubleshooting Mail

http://www.apple.com/support/ipad/assistant/mail/

Using a POP account with multiple devices

http://support.apple.com/kb/ht3228

iOS: Adding an email account

http://support.apple.com/kb/HT4810

iOS: Setting up an Outlook.com, Hotmail, Live, or MSN email account

http://support.apple.com/kb/ht1694

iPhone, iPad, iPod touch: Microsoft Outlook 2003, Outlook 2007, Outlook 2010 may not display contacts and calendars after sync

http://support.apple.com/kb/TS1944

Server does not allow relaying email error, fix

http://appletoolbox.com/2012/01/server-does-not-allow-relaying-email-error-fix/

Why Does My iPad Say “Cannot Connect to Server”?

http://www.ehow.co.uk/info_8693415_ipad-say-cannot-connect-server.html

Gmail Account Will Not Connect to Gmail Server

http://support.apple.com/kb/ts3058

Error: “Server Unavailable” when accessing Yahoo on iOS devices

https://help.yahoo.com/kb/mobile-mail/error-server-unavailable-accessing-yahoo-i os-devices-sln8834.html?impressions=true

Unable to Delete eMail Messages

http://support.apple.com/kb/TS2475

How to Delete Email on the iPad

http://ipad.about.com/od/iPad_Guide/ss/How-To-Delete-Email-On-The-Ipad.htm

How to Mass Delete Emails from iPhone and iPad Inbox (with video)

http://suiteminute.com/how-to-mass-delete-emails-from-iphone-and-ipad-inbox/

How to delete ALL mail messages from iPhone/iPad in one step

http://www.conferencesthatwork.com/index.php/technology/2014/01/how-to-delete-al l-mail-messages-from-iphoneipad-in-one-step/

How to Attach Photos and Videos to Emails on an iPhone or  iPad

http://www.wikihow.com/Attach-Photos-and-Videos-to-Emails-on-an-iPhone-or-iPad

iPad Basics: Sending an Email With An Attachment

http://ipadacademy.com/2012/03/ipad-basics-sending-an-email-with-an-attachment

How to add, send and open iPad email attachments

http://www.iskysoft.com/apple-ipad/ipad-email-attachments.html

How to Send Multiple email Attachments from your iPad or iPhone

http://ipadacademy.com/2014/03/how-to-send-multiple-email-attachments-from-your- ipad-or-iphone

How to Sync Contacts with Your iPad Using iTunes

http://www.dummies.com/how-to/content/how-to-sync-contacts-with-your-ipad-using- itunes.html

Importing a Contact List CSV to the iPad

http://techchannel.radioshack.com/importing-contact-list-csv-ipad-2235.html

iOS: ‘Mailbox Locked’, account is in use on another device, or prompt to re-enter POP3 password

http://support.apple.com/kb/ts2621

iCloud: Create a group and add contacts to it

http://support.apple.com/kb/PH2667

eMail Groups - You can use a third party app that many users recommend.

MailShot -  https://itunes.apple.com/us/app/mailshot-pro-group-email-done/id445996226?mt=8

Group Email -  https://itunes.apple.com/us/app/mailshot-pro-group-email-done/id445996226?mt=8

Group Email! Mail Client with Attachments and Cloud Services

https://itunes.apple.com/app/group-email!-mail-client-attachments/id380690305?mt =8

iPad Mail

http://www.apple.com/support/ipad/mail/

Configuration problems with IMAP e-mail on iOS with a non-standard SSL port.

http://colinrobbins.me/2013/02/09/configuration-problems-with-imap-e-mail-on-ios -with-a-non-standard-ssl-port/

Try this  - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) No data/files will be erased. http://support.apple.com/kb/ht1430

Or this - Delete the account in Mail and then set it up again. Settings->Mail, Contacts, Calendars -> Accounts   Tap on the Account, then on the red button that says Remove Account.

How to delete an email account on your iPad

http://www.shoppepro.com/support/knowledgebase/228/How-to-delete-an-email-accoun t-on-your-iPad.html

 Cheers, Tom

I was going to delete the BtYahoo account but it tells me it is linked to other apps/accounts.  What I need to know before I do this is what is the implication of deleting BTYahoo if it is has links?

The trouble here is that Apples' IOS upgrade happened, at least for me, simultaneously!  So it was very difficult to know where the exact problem lay.  Apple appears only to recognise BTYahoo for IMAP.  Help!

Where are you seeing a message that it is linked to apps/accounts ? Deleting an email account from the Mail app via Settings > Mail, Contacts, Calendars should not affect anything apart from removing that email account from the Mail app

I have deleted the account using System Preferences.  Have set it all up again.

Information on Mail Connection Doctor reads as follows:

Connection Status: Green dot Mail was unable to connect to the internet

Status            Account Name     Account type     Details

Wheeling          BT                    btinternet.com....     Connecting to server....

Red dot          Btinternet          Yahoo IMAP               Trying to log in to this Yahoo! IMAP account failed.  Verify that the username and password are correct.

Green dot     iCloud                 iCloud IMAP               Connection and login to server succeeded.

So you know the SSL box is not ticked.

I have lost all the mail into my btinternet mail box now!  I can't send mail by BTinternet or by iCloud.

Where is the problem?  With Mail or BT?

Additionaly, I tried to edit my reply but. . . .

So to answer your question when I clicked on the minus to delete the account is when the message popped up.

Additionally, i have an iPad and a iPhone 5c upgraded from 4S on 31 October and they can't do anything in mail either!

As you are referring to System Preferences I assume that you are using a Mac, not an iPad.

Do you know if you have been moved over to the new BT email, which isn't Yahoo ?

New BT email : http://bt.custhelp.com/app/answers/detail/a_id/47531/related/1

Firstly, yes I was talking about the iMac but I also have an iPad and an iPhone 5c upgraded from a 4S on Friday 31 October.

In desperation I decided to go back to BT:

BT has escalated the iMac Mail problem at their end.  The issue appears to centre around the fact that Yahoo is in the list of email providers and even though the selection allows one to enter another when one inputs the details for BT Apple Mail still recognises BTYahoo IMAP instead of IMAP.

BT are to ring me in about 24 to 48 hrs with an answer for iMAC.

We looked at the iPhone, too, and that was successfully inked to email.  Not only that it was tested to send mail, too.  I said 'Yahoo' when it came thru and laughed and said 'BT'!

Cant put my hand to the iPad but I am hoping it will be resolved, too shortly.

Thank you for the BT Customer Help link.  I had tried that but to little avail as I had undertaken all that and was slowly going dizzy from the circularness of the problem.

I have an appointment with Apple "Genius" in Exeter on Monday and will report back after that and my response from BT.

Thanks for your time and patience everyone.

Thank you guys for your help.

BT have helped to resolve the issue, but it appears still a little unstable so they are going to call me back on Friday to confirm that things are working fine.  One of the things I tried was using the email address I have with iCloud as a get around: but I can't honestly report whether that worked because it went via apple's system of BT.  However it enabled me to send emails when I couldn't use the BT address.

One thing BT said was if (and only if it continued) to try changing the password!  But I think that really will be a desperate measure.

I had this problem - the answer which worked for me (having deleted and restored the account to no avail) was this;

1. Go to [Settings] - [Mail, Contacts, Calendars]

2.  select the Email Account at fault (if you have several) - mine was labelled Btinternet

3. Having selected this, it  was labelled at the top IMAP, select the Email Account [name@btinternet.com]

4. Scroll down to OUTGOING MAIL SERVER SMTP and select [mail.btinternet.com]

5. select PRIMARY SERVER, which should be labelled [mail.btinternet.com]

6. Delete the existing Password and enter it again, select Done. The account should be Verified. Return via [<Account] [Done] [<Mail] [<Settings]

Once I had done this the outging mail worked for both my iPhone 5 iOS 8.1.1 and iPad 2 iOS 8.1.1

I had tried reinserting the password at the end of stage 3; IMAP ACCOUNT INFORMATION but this did not work. Why it should work on the next page is a mystery. I do not think the fault is entirely that of BT but can any iPhone expert explain why re-inserting the password one stage later should solve the issue?