Greylisting Log Message

[Lukas Plümper]

Hey,

I have a question regarding greylisting.

I activated greylisting on my mailserver and took a look in the logfiles.

The mail are temporary rejected with the following log message / statuscode:
451 4.7.1 Service unavailable - try again later;

Mails from my server to other servers are greylisted with messages like:
451 4.7.1 message delayed, see http://www.greylisting.org ;
452 Greylisted. Please try again after some time.
451 4.7.1 <E-MAIL-ADRESSE>: Sender address rejected: Greylisting in action. Please try again later.

Is it possible to change this log message at my server?

Best Lukas

 

[UFHH01]

Hi Lukas Plümper,

in order to avoid such issues, your mail - server should meet some standards. Please see http://www.greylisting.org/ as suggested and find :

What if my email was rejected and greylisting was mentioned as the cause?
This can happen for various reasons:

• The MTA (mail transfer agent) / email ISP that you use to send email is not RFC 821 compliant. Contact your ISP.
• The MTA is in some way misconfigured to not automatically retry email messages that gets rejected with the "try later"-message. Maybe it's timing is off and it retries immediately (which it shouldn't). Contact your ISP.
• The recipient email server has got greylisting misconfigured, ie. an implementation that just doesn't let mails through even on later retries. Or maybe their error message is actually wrong: greylisting was NOT the reason your mail bounced - but something else.

As well you will find:

Can you remove me from your blacklist/greylist?
greylisting.org is JUST an information website. We are not responsible for maintaining any specific blacklists/greylists or for maintaining any whitelists.

You need to contact the actual operator of the mail server that rejecter your email and find out it was rejected (maybe they offer a whitelisting feature).

If you need help to configure your server, please include as well your operating system and configuration files

Parallels Plesk Panel for Linux services logs and configuration files ( KB - article: 111 283 )​

to get some suggestions. Especially for your mail - server configuration, it might be helpfull to visit

http://www.mail-tester.com
and
http://mxtoolbox.com​

and include the results in your next post, so that investigations are easier for people willing to help you.

 

[Lukas Plümper]

Hey,

the greylisting itself works fine.
The only thing i want to change is the "try later"-message.

The messages my server receives from other servers name greylisting as reason.
My log message just says "451 4.7.1 Service unavailable - try again later;".
Is this a problem?
Can i change this message?

As background information:
OS: Ubuntu 14.04 LTS
Plesk: Version 12
I use the integrated greylisting function from Plesk.

Best,
Lukas