Email systems such as Gmail strictly verify the SPF resolution of domain names. If you improve the SPF resolution of your email domain name through the following four steps, the mail will not be returned.
Procedure
1. Logon to the Alibaba Cloud DNS Console.
If the domain name is not purchased from Alibaba Cloud, the following screenshot may not apply. Please send this document to your domain service provider for help.
2. Add the SPF record
a. Select your email domain from the list and lick DNS Settings.
b. On the DNS Settings page, click Add DNS Record, and then click OK.
Type: TXT
Host record: @
Record value: v=spf1 include:spf.sg.aliyun.com -all
Please note that spaces in the middle of the record value cannot be ignored
3. Delete other SPF records
Different SPF record will conflict. Only one SPF record can be retained. If no other SPF record exist, ignore this step.
Delete other SPF records whose host record is @ and whose record value starts with v=spf.
Example:
4. Wait for the SPF record to take effect globally
Wait patiently for the SPF record to take effect globally (up to 48 hours) before testing, you can avoid being returned by Gmail.
Note:
If you already have an SPF record with the value of v=spf1 include:spf1.dm.aliyun.com -all, then the record value in step 2 should be changed to v=spf1 include:spf.qiye.aliyun.com include:spf1.dm.aliyun.com -all. If not, please ignore this note.