Sites and apps similar to Postdirect include Forward Email, which is open source with a free version. Other options are Migadu, ImprovMX.com and Bottled Email. In total there are four WebMail Providers like Postdirect for self-hosting.
Forward Email is the best email service, encrypted email service, and fastest email service. It supports unlimited domains and aliases for no extra cost. It uses quantum safe ChaCha20-Poly1305 encryption and offers SMTP, IMAP, POP3, email webhooks, email regular expressions...
United States
Consolidate all your email addresses and domains at a flat price. Take back your email liberty and give unlimited email addresses to all your projects, clients and family members.
ImprovMX lets you forward emails from your domain to your personal inbox. You can create aliases to redirect any mailbox and even use webhooks to connect your emails to your app.
Netherlands
EU
Bottled gives a domain you already own real email without standing up a mail server or paying per seat for a full office suite. You point the domain at Bottled, create addresses on it, and get a web inbox, forwarding to any existing inbox, auto-reply, and contacts.
United Kingdom
Switzerland
