Symptoms
A free MXToolbox checker provides the following warning regarding the domain example.com hosted on a Plesk server:
SOA Expire Value out of recommended range
THe domain's Expire value is set to 604800 seconds or 7 days:
# dig +short SOA example.com
ns1.example.com. example.com. 2022052923 7200 3600 604800 10800
Cause
According to RFC 1912 the recommended range for SOA is 1209600 - 2419200 seconds (14-28 days).
Resolution
For one domain:
- Log into Plesk.
- Go to Domains > example.com > Hosting & DNS tab > DNS Settings > Settings tab.
- Increase the currently existing Expire value to 14-28 days.
For multiples domains use the command like in the article.
Note: Make sure to replace -soa-expire 7D with, for example, -soa-expire 14D in the command from the article.
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