Mail Provider Settings
Delivr works with any mailbox that offers IMAP for reading and SMTP for sending, with a username and password. Use the table below as a starting point, and check your provider's help pages if something has changed.
Popular providers
| Provider | IMAP server | SMTP server | Notes |
|---|---|---|---|
| Gmail / Google Workspace | imap.gmail.com:993 (SSL) | smtp.gmail.com:465 (SSL) | Requires 2-Step Verification and an app password. IMAP must be allowed in Gmail settings. |
| iCloud Mail | imap.mail.me.com:993 (SSL) | smtp.mail.me.com:587 (STARTTLS) | Requires an app-specific password. |
| Yahoo Mail | imap.mail.yahoo.com:993 (SSL) | smtp.mail.yahoo.com:465 (SSL) | Requires an app password. |
| Fastmail | imap.fastmail.com:993 (SSL) | smtp.fastmail.com:465 (SSL) | Requires an app password. |
| mailbox.org | imap.mailbox.org:993 (SSL) | smtp.mailbox.org:465 (SSL) | |
| Posteo | posteo.de:993 (SSL) | posteo.de:587 (STARTTLS) | |
| GMX | imap.gmx.net:993 (SSL) | mail.gmx.net:587 (STARTTLS) | Enable IMAP/POP3 access in the GMX settings first. |
| WEB.DE | imap.web.de:993 (SSL) | smtp.web.de:587 (STARTTLS) | Enable IMAP/POP3 access in the WEB.DE settings first. |
| IONOS | imap.ionos.de:993 (SSL) | smtp.ionos.de:465 (SSL) | Use .com/.co.uk hosts outside Germany. |
| Zoho Mail | imap.zoho.com:993 (SSL) | smtp.zoho.com:465 (SSL) | Region-specific hosts (e.g. imap.zoho.eu) apply to EU accounts. |
In most cases, the username is your full email address.
Self-hosted mail servers
Delivr is a great fit for your own mail server. Typical settings:
| Server software | IMAP | SMTP |
|---|---|---|
| Mailcow | mail.yourdomain.tld:993 (SSL) | mail.yourdomain.tld:465 (SSL) or :587 (STARTTLS) |
| Mail-in-a-Box | box.yourdomain.tld:993 (SSL) | box.yourdomain.tld:465 (SSL) |
| Stalwart | mail.yourdomain.tld:993 (SSL) | mail.yourdomain.tld:465 (SSL) |
| Docker Mailserver | mail.yourdomain.tld:993 (SSL) | mail.yourdomain.tld:465 (SSL) or :587 (STARTTLS) |
| Dovecot + Postfix | your host :993 (SSL) | your host :587 (STARTTLS) |
Choosing ports and encryption
Delivr supports three encryption modes for each server: SSL/TLS, STARTTLS, and None. With STARTTLS, Delivr refuses to continue if the server can't upgrade the connection, so credentials are never sent unencrypted by accident.
| Protocol | Port | Encryption | Use it? |
|---|---|---|---|
| IMAP | 993 | SSL/TLS | ✅ Recommended |
| IMAP | 143 | STARTTLS | ✅ Fine |
| SMTP | 465 | SSL/TLS | ✅ Recommended |
| SMTP | 587 | STARTTLS | ✅ Fine |
| Any | any | None | ❌ Avoid — your password travels in plain text |
| SMTP | 25 | — | ❌ Meant for server-to-server traffic and often blocked |
Special folders
Providers name their folders differently — Sent, Sent Items, [Gmail]/Sent Mail, Gesendet, … When you add an account, Delivr detects the Sent, Drafts, Trash, Spam, and Archive folders automatically (using the IMAP special-use flags) and asks you to confirm them. You can change the mapping later under the account's Folder Settings.