£7.99! I had the same BT email for what must have been 15 years (@btyahoo.com to then internet.com) but stopped using their ISP products years back. At first they charged £1.50pcm to keep the address, fine whatever, then £3, then £5.50 until it started getting awfully close to Spotify & Netflix prices but for....an email address. I rang & told them it was getting silly now, they offered a deal/disconnect for 6 months but in the end realised just how ridiculous it was & completely cancelled. For equivalent £2 a month got my own domain .com address & email with it. Was scary at first but glad I did it.
I had to laugh when I first saw the price increase - £7.99 a year sure but what are you paying that a month for certainly not webmail.