Add SPF record for your email relay server to avoid being counted as a spam

Posted on November 22, 2017, 1:28 pm, by admin, under dns, mail.

Step 1. Add SPF record to your DNS server

Create TXT record type and add the following text without quotes “”

@ TXT "v=spf1 a mx include:myrelay.com ~all"

Step 2. Check if SPF record is added correctly

username@laptop:/home/username# dig myhostname.com TXT
 
 <<>> DiG 9.10.3-P4-Ubuntu <<>> myhostname.com TXT
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62028
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
 
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;myhostname.com.		IN	TXT
 
;; ANSWER SECTION:
myhostname.com.	86400	IN	TXT	"v=spf1 a mx include:myrelay.com ~all"
 
;; Query time: 7 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Wed Nov 22 13:36:40 GMT 2017
;; MSG SIZE  rcvd: 104

Step 3. Test it by sending email to your gmail account, then go the receiver’s mailbox and check email source header

Received-SPF: pass (google.com: domain of www-data@myhostname.com designates 24.33.20.159 as permitted sender) client-ip=24.33.20.159;
Authentication-Results: mx.google.com;
       spf=pass (google.com: domain of www-data@myhostname.com designates 24.33.20.159 as permitted sender) smtp.mailfrom=www-data@myhostname.com
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