I had to deal with an accountant to get advice on how to file taxes after the sale of a private company. They needed information from a third party. I gave the

I had to deal with an accountant to get advice on how to file taxes after the sale of a private company. They needed information from a third party. I gave the accountant the third party's email address, firstname@lastname.co. The transaction was taking a while to get resolved. After repeated followups, the accountant finally told me that he was having a hard time getting a hold of the third party. Was I sure that their address was firstname@lastname.com? Like... what the heck. We're all corresponding over email. You could have literally clicked the email address in the email that I sent you. But instead, somehow you've mangled it and are confused that it doesn't work? That was instructive for me. .com TLDs only going forward!