Find guides, tutorials, and documentation to help you get the most out of CubePath services.
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Set up local aliases, forwarding-only virtual alias domains, virtual mailbox domains with Dovecot, catch-all addresses and plus addressing in Postfix.
Test a Postfix and Dovecot mail server end to end: DNS records, SMTP ports, TLS, SASL login, delivery, the mail queue and IMAP, then fix the usual faults.
Read and search Postfix and Dovecot logs on Ubuntu 24.04: trace a message by queue ID, find bounces and login failures, and get a daily report with pflogsumm.
Install Postfix on Ubuntu 24.04 to send and receive mail for your domain, with Let's Encrypt TLS, MX and PTR records, SPF, DKIM signing via OpenDKIM and DMARC.
Install Dovecot on Ubuntu 24.04 with Postfix to serve IMAP and POP3 over TLS, enable SMTP authentication on port 587 and block brute-force logins with Fail2ban.
Build a mail server on Ubuntu 24.04 with Postfix and Dovecot: virtual domains and users, LMTP delivery, SMTP authentication on port 587 and IMAP over TLS.
Install OpenDKIM on Ubuntu 24.04, generate a 2048-bit key, connect it to Postfix, publish the DNS record and confirm outgoing mail passes the DKIM check.
Build and publish SPF and DMARC DNS records for your mail domain, verify them with dig, read DMARC reports and move safely from p=none to a reject policy.
Fix the usual reasons mail from your own Postfix server lands in spam: reverse DNS, HELO name, SPF, DKIM, DMARC, TLS, blocklists and sender reputation.
Install SpamAssassin on Ubuntu 24.04, connect it to Postfix with spamass-milter, tune the spam score, keep rules updated and train the Bayesian filter.
