I recently bought a 2m transverter that I found advertised on Junksale.co.uk. I'm not a member of the site, but it can be viewed by non-members, and the seller had put his email address so I didn't need to go through the site to contact him.
However, I wanted to join the site, both to give feedback to the seller and also because it seems like a good site for buying and selling ham radio equipment in the UK. But when I tried to register, I received a message that "your email address has been banned. Contact the webmaster"
Puzzled about how I could have been banned from a site I'd never even heard of until now, I contacted the webmaster. He replied that "the server does not accept free email addresses. Use an ISP email address." Well, I have news for him. I don't have an ISP email address. I use Gmail, like millions of other people. It's far more convenient to use an address you don't have to change whenever you change ISP. Plus, many people use an internet connection shared with other people so, even if an email address comes with the account, it isn't theirs to use. What a ridiculous restriction!
I could, of course, have used my work email address. In fact, I tried registering using that, and then changing it to my Gmail address afterwards, but I got the "your email address has been banned" message again. It's not convenient for me to use my work address for hobby matters, so that's no use.
I could, of course, set up an email address under my web hosting account for the g4ilo.com domain. But I don't want one. Gmail provides a far superior webmail client and is better at dealing with spam than anything else I have come across. And I long ago gave up using rubbish like Outlook Express, Microsoft Outlook and Thunderbird. Why on earth go to all the bother of downloading email to a personal computer so you have to use that PC to access it, when you can access Gmail from literally anywhere? Personal computer email clients are so 1990's.
So that's that. I'm not joing to jump through hoops and set up a special email address just because some webmaster has a thing about free email addresses. I'm afraid Junksale.co.uk has ended up in the trash can.