dmarc Missing or Invalid Record

Question

Hello all
I got a problems with send email
I have installed postfix and https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy

But after all I will get emails on span and I dont know how to config dmarc?
I use this service http://mxtoolbox.com/domain/sellzcars.com/

I add to my server _dmarc.sellzcars.com.sellzcars.com. 1800 IN TXT “v=DMARC1; p=none; rua=mailto:siroga@sellzcars.com”

Answer 1

ForYourIT January 27, 2016

If you want your emails not to get in spam you need a few more things than just a DMARC. Specially when you are sending mails to Windows or Google you need to have a good reputation. They got spam filters wich will add you to the spam folder quickly if you have a small problem with your reputation. Get some more information about the following protocols if you want to get a good repu:

SPF
DKIM
DMARC
PTR

After you researched some more about these protocols and still have troubles don’t hesistate to ask me.

Reply Report

seroga111 January 27, 2016

SPF - I use https://www.digitalocean.com/community/tutorials/how-to-create-a-spf-record-for-your-domain-with-google-apps and add sellzcars.com. 1800 IN TXT “v=spf1 mx a -all”
DKIM - I use https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy

And how I can setup DMARC and PTR?
I didn’t find any articles

How To Create a SPF Record For Your Domain with Google Apps
by Keshav Pareek
Here we'll show you how to create a SPF record for your domain with Google Apps.
Reply Report
- ForYourIT January 27, 2016
  
  As DMARC you could use (for example):
  
  _dmarc.sellzcars.com. 1800 IN TXT "v=DMARC1; p=quarantine; rua=mailto:siroga@sellzcars.com; ruf=mailto:siroga@sellzcars.com; fo=0:1:d:s; aspf=s"
  
  Your PTR record will be automatically created by the DO system once you change your droplets hostname. This can be done inside your DO control panel at:
  
  Settings --> Rename
  
  I think you understand your PTR and your servers hostname should be the same to successfully use this protocol.
  
  Once you’ve successfully created all protocols wait a while (24hrs) and check for any errors at mail-tester and mxtoolbox
  For Windows it will also take longer before you get a good reputation there.
  You can sign up at the windows JMRP or SNDS wich allows you to get reports about your mails and improve your reputation.
  
  Reply Report
  
  seroga111 January 27, 2016
  
  Settings –> Rename
  How I should rename? I rename like name of my site sellzcars.com
  
  Reply Report
  
  ForYourIT January 27, 2016
  
  If that is the hostname you use for your mailserver then yes. This is the hostname you also use for your mailserver config and system hostname.
  
  Reply Report

Answer 2

seroga111 January 27, 2016

SPF - I use https://www.digitalocean.com/community/tutorials/how-to-create-a-spf-record-for-your-domain-with-google-apps and add sellzcars.com. 1800 IN TXT “v=spf1 mx a -all”
DKIM - I use https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy

And how I can setup DMARC and PTR?
I didn’t find any articles

How To Create a SPF Record For Your Domain with Google Apps
by Keshav Pareek
Here we'll show you how to create a SPF record for your domain with Google Apps.
Reply Report
- ForYourIT January 27, 2016
  
  As DMARC you could use (for example):
  
  _dmarc.sellzcars.com. 1800 IN TXT "v=DMARC1; p=quarantine; rua=mailto:siroga@sellzcars.com; ruf=mailto:siroga@sellzcars.com; fo=0:1:d:s; aspf=s"
  
  Your PTR record will be automatically created by the DO system once you change your droplets hostname. This can be done inside your DO control panel at:
  
  Settings --> Rename
  
  I think you understand your PTR and your servers hostname should be the same to successfully use this protocol.
  
  Once you’ve successfully created all protocols wait a while (24hrs) and check for any errors at mail-tester and mxtoolbox
  For Windows it will also take longer before you get a good reputation there.
  You can sign up at the windows JMRP or SNDS wich allows you to get reports about your mails and improve your reputation.
  
  Reply Report
  
  seroga111 January 27, 2016
  
  Settings –> Rename
  How I should rename? I rename like name of my site sellzcars.com
  
  Reply Report
  
  ForYourIT January 27, 2016
  
  If that is the hostname you use for your mailserver then yes. This is the hostname you also use for your mailserver config and system hostname.
  
  Reply Report

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