How to add SPF record for all domains on Plesk server?

Applicable to:

SPF record for all domains can be added as follows:

For Windows

Connect to the server via RDP and open command prompt as Administrator
Get the list of domains:

C:\> "%plesk_bin%\dbclient.exe" --direct-sql --sql="SELECT name FROM domains" > dns.txt
Add TXT record for all domains as follows:

C:\> for /f "skip=1" %i in (dns.txt); do ("%plesk_cli%\dns.exe" -a %i -txt "v=spf1 some_spf_text")

Change some_spf_text by the required record. For more information see: How to create SPF rule for the domain?

For Linux

Connect to the server via SSH
Find domains without spf TXT record:
# plesk db -Ne "select name from domains where dns_zone_id not in (select dns_zone_id from dns_recs where type='TXT' and val like '%spf%');" > domains_without_spf.txt
Add spf record
# cat domains_without_spf.txt | while read i; do echo $i; plesk bin dns -a $i -txt "some_spf_text" ;done

Change some_spf_text by the required record. For more information see: How to create SPF rule for the domain?