From the email that Kraken sent to you, you can use any of the three methods to verify your withdrawal address, it may not be necessary be signing message with bitcoin address.

The 2FA verification will be very fast. Or you did not set 2FA on the exchange? Set it and you can use it. It is advisable to set 2FA on an exchange.
Or if you have small amount on your wallet, you can send it to your address on the exchange. But I still prefer the 2FA which is highly recommended.

It is possible.

After you have connected your Trezor wallet with Electrum, click on tools -> sign/verify message. Input the address and the message and click on sign. It will generate you the signature.

The message, your bitcoin address and the signature are what you need on kraken. I think Kraken will give you instruction of what you should include on the message.

From the email that Kraken sent to you, you can use My of the three methods to verify your withdrawal address, it may not be necessary be signing message with bitcoin address.

The 2FA verification will be very fast. Or you did not set 2FA on the exchange? Set it and you can use it. It is advisable to set 2FA on an exchange.
Or if you have small amount on your wallet, you can send it to your address on the exchange. But I still prefer the 2FA which is highly recommended.

It is possible.

After you have connected your Trezor wallet with Electrum, click on tools -> sign/verify message. Input the address and the message and click on sign. It I'llwill generate you the signature.

The message, your bitcoin address and the signature will be required byare what you need on kraken. I think Kraken will give you instruction of what you should include on the message.

From the email that Kraken sent to you, you can use My of the three methods to verify your withdrawal address, it may not be necessary be signing message with bitcoin address.

The 2FA verification will be very fast. Or you did not set 2FA on the exchange? Set it and you can use it.
Or if you have small amount on your wallet, you can send it to your address on the exchange. But I still prefer the 2FA.

It is possible.

After you have connected your Trezor wallet with Electrum, click on tools -> sign/verify message. Input the address and the message and click on sign. It I'll generate you the signature.

The message, your bitcoin address and the signature will be required by kraken.