Adding DKIM to Postfix

DKIM on Postfix: The configuration can be tested by sending an empty email to and a reply will be received. If everything works correctly you should see DKIM check: pass under Summary of Results. ========================================================== Summary of Results ========================================================== SPF check: pass DomainKeys check: neutral DKIM check: pass Sender-ID check: pass SpamAssassin check: Read more about Adding DKIM to Postfix[…]

Email Administration for Postfix , Plesk and Qmail

rDNS (Reverse DNS)

The Reverse DNS for an IP should be set to the EHLO value that is sent in the outgoing mail header. This is generally the HostName of the computer.

This value should also match the outgoing IP address used to send the mail.

On a multi-IP server, if the sending IP does not match the EHLO domain, you may be sending from Postfix. Switching to Qmail may cause the sending IP to match the primary IP on the server, which should correct any mis-matched IP/EHLO issues.



Amazonon DMARC ( This Google article is also helpful: If you scroll down to the ‘Example records’ section, you’ll see a number of examples on how to write the TXT record. Here’s an example of that record: 3600 IN TXT “v=DMARC1; p=quarantine; pct=5;”

IMAP and POP Email Settings

For a plesk server IMAP Incomming server Server: Connection security: none Authentication: Password, transmitted insecurely User Name: Port: 143 Outgoing Server: Server: Connection security: STARTTLS Authentication: Encrypted password User Name: Incomming: Port 587 POP Incomming server Server: Connection security: STARTTLS Authentication: Encrypted Password User Name: Port: 110 Outgoing Server: Read more about IMAP and POP Email Settings[…]

Clear Mail queue on Postfix or Plesk

How to clear the mailqueue. Check the mailq: # /usr/local/psa/admin/bin/mailqueuemng -s View 5 of the items for a certain domain: # /usr/local/psa/admin/bin/mailqueuemng -s | grep -C 5 # /usr/local/psa/admin/bin/mailqueuemng -D” or # postsuper -d ALL If you get a permission error on an older PLesk 9 instance # /usr/sbin/postsuper -d ALL To remove specific Read more about Clear Mail queue on Postfix or Plesk[…]

Setting up mail on iPhone/iPad/iOS

Source: If you use a common email provider, your device will load your email settings automatically. If your device doesn’t load these settings and you don’t know them, contact your email provider and ask for this information: My Email settings My email address: My email provider: Incoming Mail Server Settings Account type (POP Read more about Setting up mail on iPhone/iPad/iOS[…]