What it does
addy.io provides email aliases for an existing inbox. Its documented features include on-the-fly addresses, custom domains, sender rules, tracking-pixel removal and PGP encryption of forwarded mail.
addy.io supports two useful address styles. A username-based address can be invented when needed, while a random alias avoids putting the same username in every address. The dashboard tracks aliases and lets you turn off one that receives unwanted mail.
Replies and new messages from aliases are paid-plan features. The free allowance also has a forwarding-bandwidth limit, so check the expected message volume before assigning an alias to a busy account. Custom-domain aliases offer a practical portability option: the provider explains that addresses on a domain you own can move elsewhere, while its own domains depend on addy.io.
The reviewed Free table allows 10MB of forwarded email per month. The page also states that messages are forwarded without storage, except failed deliveries when you enable storing them. That exception matters when choosing how much delivery troubleshooting data to retain.
Strengths
- Username-based and random aliases cover different address-sharing needs.
- Custom-domain aliases can be moved by changing the domain’s mail routing.
- Forwarding supports optional OpenPGP encryption.
Watch out for
- Replies and sending from aliases require a paid plan.
- The free plan has a monthly forwarding-bandwidth limit.
Best for
- People managing separate signup addresses with one main inbox
Sources
- Free, Open-source Anonymous Email Forwarding - addy.io (Oct 26, 2026)
- addy.io official project license (Oct 26, 2026)