01 / UNDERSTAND
What is 33mail?
33mail lets users invent aliases under their own 33mail subdomain.
An alias can be created for each website, and blocked later without changing the recipient’s main address. The service also supports replies through aliases.
02 / DECIDE
How should you handle 33mail signups?
Support verification through the alias and make delivery failures recoverable with an address-change flow.
Explore your signup policy ↗03 / KEEP IN MIND
What you cannot infer
A website-specific alias can represent a long-term customer rather than a throwaway inbox.