Hi @Craig_Albert,
May I ask what email provider are you using? I would also appreciate it if you could send us details about the issue after following the steps provided by my colleague @MichelleT. This way, we can narrow down the issue and find a solution from there.
We also have a guide on Internet Service Provider (ISP) and Port Information that I'm sure you'll find helpful.
I'll be on the lookout for your response. Please know that we're always here to lend a hand. Thanks for dropping by and I wish you have a great day ahead.
