Another email server issue. Coincidentally, I noticed an error in the maillog when sending to my email address. Mar 2 15:13:40 mail postfix/smtp[28811]: certificate verification failed for mail.xxxxx.ca[144.217.111.73]:25: untrusted issuer /O=Digital Signature Trust Co./CN=DST Root CA X3 As it turned out, there was nothing wrong with the certificate or the issuer on the receiving end. […]
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Category: email
Configuring Outlook 2016 For Your IMAP Server
The following describes the correct settings for Outlook 2016 for your IMAP server. When firstly adding the account. Account Type: IMAP Incoming mail server: mail.your-domain.ca Outgoing mail server (SMTP): mail.your-domain.ca User Name: Full email address. Ensure that “Require logon using Secure Password Authentication (SPA)” is unchecked. We have a secure mechanism in place but we […]
Email Server Admin Tools & Methods
Example server is running CentOS 7, with Postfix, Dovecot, Amavisd, and Clamd. ISPConfig 3.1 is our main server management tool. There is a cron job which checks the expiry date of the security certificates. If the expiry date is within a few days, the cron job obtains a new certificate via Let’s Encrypt. (We need […]