How does Plesk's new greylisting work?

[hgmichna]

I understand that greylisting means that emails are, at first, rejected and only accepted at the second delivery attempt. This, however, means that emails are delayed, possibly by hours, depending on the time the sender takes before retrying.

Is this delay always there for all emails or does the greylisting software somehow recognize known good senders and stops greylisting these?

Any idea what the usual delays are?

 

[IgorG]

As I know default delay value is 5-6 min. It can be changed with /usr/local/psa/admin/sbin/glmng utility with '--grey-interval' option.

 

[hgmichna]

As I know default delay value is 5-6 min. It can be changed with /usr/local/psa/admin/sbin/glmng utility with '--grey-interval' option.

Thanks, but isn't it the remote sending SMTP server that determines after which time it resends? I thought I have no influence on that.

Apart from that, does the greylisting software somehow recognize known good senders and stops greylisting these?

 

[IgorG]

I think that for understanding how it works you may read this carefully http://en.wikipedia.org/wiki/Greylisting
I hope it will help.

 

[hgmichna]

I think that for understanding how it works you may read this carefully http://en.wikipedia.org/wiki/Greylisting
I hope it will help.

Sorry, no, because I know very well how greylisting generally works. I was hoping that somebody could answer the questions who knows how Plesk's greylisting is configured.

I have not got this answer from you people.