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Issue Change HELO hostname

WhiteLAB

New Pleskian
Server operating system version
Ubuntu 22.04 x64
Plesk version and microupdate number
18.0.52
Hi there,

I've been trying to setup my email account and testing the configuration with mail-tester.com.

While doing so mail-tester.com is showing the following error
454.png
86876.png

My hosting service "vultr" told me the following:
"As shown in the error message your rDNS record is correct, and the IP they report is correct as well. The HELO is sending an incorrect hostname. This will need to be changed, and likely has a configuration parameter for the service in Plesk. Unfortunately if you do not see this option you may need to contact Plesk support for further assistance."
 
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