Fix “opendkim-testkey: unexpected reply class/type (-1/-1)”
OpenDKIM can’t look up your DKIM record. Give it working DNS resolvers with the Nameservers setting, restart and test again.
विषय
Email Servers
Daily Postfix Mail Reports with pflogsumm
Turn /var/log/mail.log into a readable summary of deliveries, bounces, rejections and warnings – and email it to yourself every morning.
Brand Roundcube Webmail per Domain on a Shared Mail Server
Hosting several mail domains on one Roundcube install? Show each customer their own logo, chosen automatically from the webmail address they visit.
Install and Configure Postfix on Ubuntu: The Essentials
Install Postfix as an Internet Site, understand the main.cf settings that matter – myhostname, mydomain, mydestination – and verify it’s running.
Why I Moved My Mail Servers from Exchange to Postfix and Dovecot
Building a Linux mail server on Ubuntu with Postfix, Dovecot and MySQL – and how proper SPF, DKIM and DMARC took deliverability…
Exchange “Year 2022” Bug: Mail Stuck in Queues (FIP-FS) – Workaround and Fix
On 1 January 2022, on-premises Exchange servers stopped delivering mail because the malware-scanning engine couldn’t read its own version number. Here’s the…