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Fastmail has first-class support for exactly what you want. Settings > Users & Aliases > + New Alias > "Show advanced preferences". There's a checkbox that says
by mttjj 4y ago
Fastmail has first-class support for exactly what you want. Settings > Users & Aliases > + New Alias > "Show advanced preferences". There's a checkbox that says "Disable - Reject (bounce) all mail sent to this address (disable the alias) Disable a specific address when you have a wildcard (catch-all) alias."
- beeboop 4y agothanks - i didn't realize i could make an alias after the fact and then disable. appreciate it!