A good way to check the connectons to mail ports is to use netstat: # netstat -anp | grep :25 tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 2170/master tcp6 0 0 :::25 :::* LISTEN 2170/master # netstat -anp | grep :465 tcp 0 0 0.0.0.0:465 0.0.0.0:* LISTEN 2170/master tcp6 0 0 :::465 :::* LISTEN 2170/master # Read more about Check Mail Port Connections with netstat[…]
DKIM on Postfix: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy The configuration can be tested by sending an empty email to firstname.lastname@example.org 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[…]
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 (http://sesblog.amazon.com/post/Tx22ZELXSSZRYZR/What-is-DMARC-and-should-you-use-it). This Google article is also helpful: https://support.google.com/a/answer/2466563?hl=en 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: _dmarc.advancedmediawebs.com. 3600 IN TXT “v=DMARC1; p=quarantine; pct=5; rua=mailto:email@example.com”
Add the clean IP to the server. Edit the firewall to NAT all connections FROM port 25 to use the new IP. # iptables -t nat -A POSTROUTING -p tcp –dport 25 -j SNAT –to-source NEW.IPA.DDR.ESS # service iptables save Ensure that the IP is on eth1 or… # iptables -t nat -A POSTROUTING -o Read more about Change IP route for Blacklist[…]
Normally, checking mail may produce an SSL error for plesk mail services. All clients Outlook, Mac mail, thunderbird, show a a message for ssl certificate. How to fix it. You would need to purchase a SSL certificate for your servers hostname and set it up so it gets used for the mail service on the Read more about SSL for Mail Server Plesk[…]
Check the header of an email X-Spam-Status: No, score=0.1 X-Spam-Score: 1 X-Spam-Bar: / X-Ham-Report: Spam detection software, running on the system “server.domain.com”, has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn’t spam) or label similar future email. If you have Read more about Is SpamAssassin Working[…]
For a plesk server IMAP Incomming server Server: mail.domain.com Connection security: none Authentication: Password, transmitted insecurely User Name: firstname.lastname@example.org Port: 143 Outgoing Server: Server: mail.domain.com Connection security: STARTTLS Authentication: Encrypted password User Name: email@example.com Incomming: Port 587 POP Incomming server Server: mail.domain.com Connection security: STARTTLS Authentication: Encrypted Password User Name: firstname.lastname@example.org Port: 110 Outgoing Server: Read more about IMAP and POP Email Settings[…]
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 email@example.com # /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[…]
Source: http://www.one.com/en/support/guide/mail/setting-up-mail-on-iphone-ipad-ios http://support.apple.com/kb/HT4810 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[…]