TEST THAT BITCOIND'S TXINDEX IS NOT CORRUPTED
(AND THE PUBLIC ELECTRUM SERVER IS WORKING CORRECTLY)

Use these addresses found on the Internet:

https://www.blockchain.com/btc/address/18zuLTKQnLjp987LdxuYvjekYnNAvXif2b
https://www.blockchain.com/btc/address/1NT1jtYLNwFXLztD4U4B9sLizdYatirhWW
https://www.blockchain.com/btc/address/1f1miYFQWTzdLiCBxtHHnNiW7WAWPUccr
https://www.blockchain.com/btc/address/12tkqA9xSoowkzoERHMWNKsTey55YEBqkv
https://www.blockchain.com/btc/address/1KbrSKrT3GeEruTuuYYUSQ35JwKbrAWJYm
https://www.blockchain.com/btc/address/198aMn6ZYAczwrE5NvNTUMyJ5qkfy4g3Hi

which contain transactions from every year, from 2009 to 2025. They sum up to:

8020.70184370 + 2500.00269435 + 10009.26339441 + 28151.05940521 + 10000.01689482 + 8000.00656056 = 66681.05079305 (btc)
(at time of testing: May 3, 2025)

Then move .electrum to another filename and start Electrum as:

run_electrum --oneserver --server bitcoinserver.nl:50002:s

Choose "default_wallet" and  "Import Bitcoin addresses or private keys" and past the above addresses:

18zuLTKQnLjp987LdxuYvjekYnNAvXif2b 1NT1jtYLNwFXLztD4U4B9sLizdYatirhWW 1f1miYFQWTzdLiCBxtHHnNiW7WAWPUccr 12tkqA9xSoowkzoERHMWNKsTey55YEBqkv 1KbrSKrT3GeEruTuuYYUSQ35JwKbrAWJYm 198aMn6ZYAczwrE5NvNTUMyJ5qkfy4g3Hi

If transactions in Electrum sum up to: 66681050.79305 (mbtc) =  66681.05079305 (btc), everything is working just fine!