I recently found out there is a limit to the number of masked emails you can have on Fastmail (1000, iirc -- definitely not infinite for practical purposes). Also, I miss the option of being able to create masked emails on all the domains I connected to Fastmail -- you can only use the "main" one.

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clickety_clack 4 hours ago | parent [-]

If you have 1000, it might be better to just set up a custom domain and just use a wildcard alias.

	▲	mmcclure 3 hours ago \| parent [-]
		This is what I do, and my usage is very similar pattern to the posted project. Everything gets {service}@{type}.mydomain.com, so, for example, twitter@social.mydomain.com. I really only use the subdomain for some automated tagging, but it's come in handy.