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You can use aliases. You get 600 aliases with Fastmail for example. But really you could just set up a 'catch all' and have everything routed to one inbox, the

You can use aliases. You get 600 aliases with Fastmail for example. But really you could just set up a 'catch all' and have everything routed to one inbox, then use filters to filter the emails to separate folders. So emails to $PERMUTE1@domain.com could be filtered to a $PERMUTE1 folder, and so on.

bad_user 6y ago
Fastmail supports "subdomain addressing" out of the box. So if the email address is ... user@domain.com ... then you can use ... <anything>@user.domain.com ... without setting up any extra aliases, Fastmail will just handle it as if it's for user@domain.com. And you can also reply from such addresses without extra configuration. On the desktop I use MailMate as my email client, which works great with dynamic aliases. The win is that you don't have to configure anything extra when signing up for some online service. https://www.fastmail.com/help/receive/addressing.html https://www.fastmail.com/help/receive/addressing.html You can do this in Google Suite btw, as you can configure a forwarding rule. The problem with Google Suite, last time I tried, is that they no longer want to sign emails with DKIM for such dynamic aliases, so you can receive emails just fine, but sending emails from such addresses is a problem if you have SPF/DKIM domain rules.
- myu701 6y ago
  This is what I do, for both Fastmail and replicated for my own email domain.
- PuffinBlue 6y ago
  That's good to know. I've only just switched 48 hours ago, so this is something I'll look at. I had them handle my DNS for that domain so I'm assuming this won't require any extra setup.
battery_cowboy 6y ago
One Fastmail alias can be "(asterisk)@domain.tld", by the way, so you can send and receive emails to every address possible. When you send an email from the (asterisk) alias, you can type whatever you want in the from address box. I use their DNS as my primary DNS for all my domains so I can email to/from all of them easily like this. (asterisk) means the character itself, I can't figure out how to type one on this site though. Edit: this wasn't a feature 3 years ago, I only discovered this 4 months ago when I added a few domains to my account and they added the (asterisk) aliases for those automatically.

bad_user 6y ago

Fastmail supports "subdomain addressing" out of the box. So if the email address is ... user@domain.com ... then you can use ... <anything>@user.domain.com ... without setting up any extra aliases, Fastmail will just handle it as if it's for user@domain.com. And you can also reply from such addresses without extra configuration. On the desktop I use MailMate as my email client, which works great with dynamic aliases. The win is that you don't have to configure anything extra when signing up for some online service. https://www.fastmail.com/help/receive/addressing.html https://www.fastmail.com/help/receive/addressing.html You can do this in Google Suite btw, as you can configure a forwarding rule. The problem with Google Suite, last time I tried, is that they no longer want to sign emails with DKIM for such dynamic aliases, so you can receive emails just fine, but sending emails from such addresses is a problem if you have SPF/DKIM domain rules.

myu701 6y ago
This is what I do, for both Fastmail and replicated for my own email domain.
PuffinBlue 6y ago
That's good to know. I've only just switched 48 hours ago, so this is something I'll look at. I had them handle my DNS for that domain so I'm assuming this won't require any extra setup.

battery_cowboy 6y ago

One Fastmail alias can be "(asterisk)@domain.tld", by the way, so you can send and receive emails to every address possible. When you send an email from the (asterisk) alias, you can type whatever you want in the from address box. I use their DNS as my primary DNS for all my domains so I can email to/from all of them easily like this. (asterisk) means the character itself, I can't figure out how to type one on this site though. Edit: this wasn't a feature 3 years ago, I only discovered this 4 months ago when I added a few domains to my account and they added the (asterisk) aliases for those automatically.