![g suite high spam filter settings spf g suite high spam filter settings spf](https://www.duocircle.com/wp-content/uploads/2021/07/spf-dkim-office-365-smtp-server.png)
But this MXToolbox “Sender Policy Framework (SPF) Record Lookup” tool explains it quite nicely: A deep explanation of what an SPF record is can be found on the official SPF website. What is an SPF (Sender Policy Framework) record?Īnother piece of the basic puzzle of getting mail to not be flagged as SPAM is to ensure a proper SPF record is set. Or if you are comfortable with the command line in Linux/Unix just run a command like this: dig -x 123.456.789.0 To check your server’s PTR record, you can use a tool like this MXToolbox “Reverse IP Lookup” tool. But places like Rackspace just let you set those values on your own without the need to ask for permission. Others will make you contact them-either by email, phone or mail-to have a record set.įor example I know Amazon’s EC2 setup allows you to make a request via a web form for getting a PTR record set and there is no guarantee they would approve a PTR record change although most of the time they do. Some service will allow you to independently set the PTR record via a control panel.
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What a PTR record does is basically “vouch” for any mail coming off of a server at that IP address and says, “Okay, you got an email from off of one of our servers? Let me check and see if that server is associated with ?” The answer to that question would either be, yes that server is allowed to send emails for or no, we have no clue what that is… Do what you wish with that mail.Īs for how to set a PTR record, it depends on your server’s hosting service and policies. But just because a server can send mail doesn’t mean what it sends is valid.
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This is a cross-reference check against SPAMmers since the reality is anyone can setup an actual basic mail server on most any PC in the world. But that value would be set not in a DNS entry as you might know it, but within the DNS servers that are connected to the hosting service itself.
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So if your server’s IP address is 123.456.789.0 then a PTR record lookup for that IP address would have to match your server’s hostname. It’s the opposite: A PTR record is a record of what hostname an IP address is assigned to from the point of view of the hosting service that assigned that server an IP. Might sound like a standard hostname lookup, but it’s not at all. Simply put a PTR record is a reverse DNS record that connects an IP address to a hostname. Remember: Any server in the world can send emails and SPAM protection is a scoring system and not an exact science. The issue is most likely you don’t have a proper PTR record or SPF record setup for the server. How can avoid Gmail servers from flagging my emails as “unwanted?” I haveĪlso used email accounts that belonged to different domains. Creating more email accounts didn’t help. Though, it seems like Google Gmail servers have been flagging myĮmails as “Junk” for a very long time but other providers, such as You should only deal with DKIM stuff if you have no other choice not because it’s hard to setup but it’s not going to mean much of anything without valid PTR and SPF records in place. But in my experience, most server setups just need to get a PTR record set coupled with an SPF for SPAM flagging to disappear. Past both of those is the concept of DKIM (DomainKeys Identified Mail) and it’s use to validate mails.
![g suite high spam filter settings spf g suite high spam filter settings spf](https://d1rytvr7gmk1sx.cloudfront.net/wp-content/uploads/2018/04/c-spoofing-and-authentication.jpg)
Related but if you don’t have an SPF (Sender Policy Framework) record set for the domain name, that won’t help anything at all so you should have that set as well.īut in the end, the PTR is really the most important thing followed by the SPF.
![g suite high spam filter settings spf g suite high spam filter settings spf](https://images.prismic.io/sysblog/101387b5-d2b3-45fa-aa71-03824fbf494a_Gmail+Security+Settings+-+Point+1.jpeg)
In my experience not having a PTR (reverse DNS) record set for the IP address of a server is the number one way email gets flagged as SPAM on services like Gmail and even AOL.