DMARC

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:mark@domain.com”

DNS open resolver test

# dig +short test.openresolver.com TXT @1.1.1.1 (IP of the server) Other Information Test your server for an open DNS resolver here: http://openresolver.com/ Closing DNS Resolvers on Windows Server 2003/2008/2008 R2: http://technet.microsoft.com/en-us/library/cc787602(v=ws.10).aspx Windows Servers running Plesk: http://kb.parallels.com/en/116463 Closing DNS Resolvers on Servers running Bind: http://www.zytrax.com/books/dns/ch9/close.html

Cannot Contact Outlook.com

Mail for some reason is not delivering to outlook.com Find your namservers. #cat /etc/resolv.conf nameserver 69.xx.xx.xx nameserver 69.xx.xx.xx – in this case the example is 69.xx.xx.xx $ dig MX outlook.com @69.xx.xx.xx ; <<>> DiG 9.9.2-P2-RedHat-9.9.2-3.P2.el5 <<>> MX outlook.com @69.64.66.11 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 19033 ;;…

DNS server fails to start in plesk

Starting the DNS server fails. restarting named shows the following error: service named restart Stopping named: [ OK ] Starting named: Error in named configuration: zone 0.0.127.IN-ADDR.ARPA/IN: loaded serial 20010622 zone domain1.com/IN: loaded serial 1415397236 zone domain2.org/IN: loaded serial 1415411359 zone domain3.com/IN: loaded serial 1415556389 Thats the okay part And then you see this: zone…