Manymail: send from any alias

Manymail is a send-only mail client for people who own domains. Configure a domain and its SMTP server once. After that, every time you write a message you choose the address it comes from — the part before the @ and the display name are both free text, exactly as they are in a desktop mail client. Send as hello@, billing@, no-reply@ or a one-off alias, without setting up a separate account for each one. WHAT MAKES IT DIFFERENT Most Android mail apps tie the From address to the account you signed in with. Manymail does not. Your saved SMTP username and password authenticate the connection; they do not decide which address you are allowed to send from. That restriction is a choice client software makes, not a rule of the mail protocol, and Manymail declines to make it. Your mail server still decides. Many servers refuse a sender address that the authenticated account does not own. Manymail does not try to predict that in advance — it attempts the send exactly as you typed it, then shows you the server's own reply, word for word, with the full SMTP transcript available if you want to read it. Credentials are stripped from that transcript before it is stored. WHAT IT DOES • A free-form alias and display name, on any domain you have configured • Per-domain SMTP settings: STARTTLS, implicit TLS or plain, with PLAIN, LOGIN or CRAM-MD5 authentication and auto-detection • A connection test that reports every step, including the server's raw banner and advertised capabilities • Rich text or plain text, with a genuine plain-text alternative built from the document rather than stripped out of HTML • Attachments, inline images, Reply-To and custom headers • Saved identity presets for each domain • Drafts, an outbox that retries with exponential backoff, and a searchable sent log • Encrypted configuration backup and restore • An optional lock using your biometrics or device PIN WHAT IT DELIBERATELY DOES NOT DO • No inbox. There is no IMAP, no POP and no sync. Manymail sends mail; it does not receive it. • No account with us. There is no sign-up, and no server of ours is involved at any point. • No analytics, no telemetry, no crash reporting, no ads and no advertising ID. The only network connections Manymail makes are to the SMTP servers you enter yourself. YOUR PASSWORDS SMTP passwords are stored in the Android Keystore and nowhere else. They are never written to the app's database, never written to a log, and removed from every protocol transcript before it is saved. An unencrypted configuration export leaves them out entirely and says so inside the file. An encrypted export is sealed with Argon2id key derivation and AES-GCM-256 using a passphrase you choose. WHAT YOU NEED A domain, and an SMTP server you are allowed to send through — from your mail provider, your web host, or a transactional mail relay. Manymail does not provide mail accounts and cannot send anything without server details and credentials that you supply. FREE SOFTWARE Manymail is published under the GNU General Public License v3.0. The complete source code is public, so you can read exactly what the app does, build it yourself, and compare it with what you installed. Source code: https://github.com/bunnypranav/Manymail