So I'm about to switch to everyone.net for e-mail hosting. I want to keep the http://webmail.mydomain.com URL for my users to to use browser-based e-mail. Is this possible? everyone.net will offer me a URL like http://mydomaincom.mail.everyone.net. After changing my MX records to everyone.net's servers, can I set-up a subdomain on the DH web panel that redirects http://webmail.mydomain.com to the URL above provided by everyone.net? Or will DH tell me it cannot setup a new subdomain "webmail.mydomain.com" because it already exists? Thanks in advance for any insight.

If you disable webmail for the domain in question, it *should* let you. Key word here is should. I haven't tried it since email on DH works just fine for me, or will when it stops being slow. But, if DH doesn't have a reason to set up webmail.yourdomain.com, then it should let you. Alternatively, you can always rename webmail.yourdomain.com to something else, and reuse that.

Yes, I have an opinion.

Get a minimum 50% off with the "haveadreamyday" promo code, and... have a dreamy day. Original, no?

I was actually lurking here to find an answer to a problem I was having related to this.

If you switch to custom MX, the "non-editable" webmail.yourdomain.com record appears to be removed and you can add a CNAME or an A record of that name. I haven't verified that it resolves since that was not what I actually wanted to accomplish.

I was looking to create webmail.yourdomain.com as a subdomain and that fails with "Can't add domain: already in our DNS system."

Haven't dug for a workaround yet. If I don't find one I'll probably open a support ticket.

Renaming webmail.domain.com, or disabling webmail, should free up that domain. I haven't actually tried either, but... it would make sense. If you don't plan to use DH's webmail, try disabling it, then adding that domain as a subdomain. Or rename it to something off the wall that you're not likely to bother with, since you're not using it anyway.

Yes, I have an opinion.

Get a minimum 50% off with the "haveadreamyday" promo code, and... have a dreamy day. Original, no?

Looks like there's a bug of some sort. With custom MX active I can create a DNS record for webmail..., but not a sub-domain for webmail...

I've opened a ticket. We'll see how it goes.