Mail

Tundra manages a full mail stack: Postfix (SMTP), Dovecot (IMAP/POP3), Rspamd (spam filtering + DKIM signing), and optionally Roundcube (webmail).

Setting up a mail domain

1. Go to Mail → Domains → Add

2. Step 1 — Core records

   • Enter the domain
   • Tundra generates the recommended MX and SPF records
   • Copy these to your DNS zone (or use a DNS template)

3. Step 2 — DMARC & preview

   • Configure DMARC policy (none, quarantine, reject)
   • Preview all DNS records before saving

4. Generate DKIM key

   • Click Regenerate DKIM on the domain detail page
   • Tundra generates a 2048-bit RSA keypair, stores the private key encrypted (AES-256-GCM), and shows the public key TXT record to add to DNS

Mailboxes

Create mailboxes in Mail → [domain] → Mailboxes → Add:

• Username + password (Argon2id hashed)
• Quota (MB)
• Aliases

Password reset available via Mailboxes → [mailbox] → Reset Password.

Aliases

Aliases forward to one or more mailboxes:

info@example.com  →  alice@example.com, bob@example.com

Create in Mail → [domain] → Aliases → Add.

Mail queue

View and manage the Postfix queue in Mail → Queue:

• Hold — suspend delivery of a message
• Release — resume delivery
• Delete — permanently discard

Diagnostics

Mail → [domain] → Diagnostics runs automated DNS checks:

Check	What it verifies
MX	MX record points to your server
SPF	SPF record allows your server’s IP
DKIM	DKIM public key matches the active key
DMARC	DMARC record is valid

A Send test email button lets you verify delivery end-to-end.