How to disable delay reponse

[smileluo]

When remote server send emails to PMG,the PMG will send something like:
220-xxxxxx
Then wait for 15~20 seconds,send the response
220 xxxxxx
How to disable this function?

 

[Stoiko Ivanov]

This is postscreen doing protocol checks:
https://www.postfix.org/POSTSCREEN_README.html

The checks help catch quite a few broken spamsenders and are only active on the external port - Why do you want to disable this?

I would recommend against disabling postscreen.
If you still want you need to adapt the postfix configuration using the templateing system:
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmgconfig_template_engine

I hope this helps!

 

[smileluo]

just want to speed up email from some IPs,no delay reponse

 

[Stoiko Ivanov]

postscreen caches positive results from those tests - only the first time an IP connects it will need to wait ...

 

[smileluo]

But it still takes about 10s or more the get the response 220 xxxx