cidr | PHP IP/CIDR | TCP library

I'm writing a Milter for Postfix, that handles incoming messages in a server (Postfix+Dovecot) with virtual domains and users. Communication beetweend Postfix and the Milter are done with the Sendmail Milter Protocol V 2

I really need that Dovecot (and Postfix by consequence) does not reject messages with invalid recipient, because I need the Milter to do this check (and reject as weel).

This is needed because i'm writing a PEC mail server (Pec stand for Posta Elettronica Certificata, that is an Italian implementation for certified mail).

When receiving mails with incorrect recipient, I need to produce a specific receipt in a form of an e-mail.

But Postfix in this case (told by dovecot) reject the mail BEFORE sending it to the Milter.

I've tried to search this in the documentation, but were not able to find this specific need.

I've attached PostFix configuration....

I am trying to create cluster by using this article in my WSl Ubuntu. But It returns some errors.

Errors:

I am trying to add a whole CIDR IP ranges into "no_proxy" settings on my Dockerfile. However, I couldn't get it to work. The echo command that I used echo 10.144.192.{1..255} | sed 's/ /,/g' isn't expanded by during the docker build.
I expect the IP to be expanded to 10.144.199.1,10.144.199.2,10.144.199.3....
The standard CIDR 10.144.199.0/24 doesn't work either, I think it's related to the OS I am using (Debian 10.8). Thanks in advance for any helps given.

Here is the result after I entered the container:

Here is my Dockerfile

I have the python code below that is creating a large shell script. I want to use the \n to make a new line to keep the script looking clean but the \n appears to cause the shell not look past the first line. If I edit the script in textpad/sublime I can strip the /n's and script runs fine. I know /n is a new line but is there any way to get python to write to separate lines without appending /n to end

I can create new inbound rule by using following command:

I have 2 services test1,test2 and for each service i have to create 6 vm's.This 6 vm's should be placed in 3 subnet id's which created in 3 different zones in a same region

In this services,test1 will be in private subnets and test2 will be in public subnets.So i have to pass that correct subnet id when creating ec2 instances

I'm trying to deploy the ELK stack to my developing kubernetes cluster. It seems that I do everything as described in the tutorials, however, the pods keep failing with Java errors (see below). I will describe the whole process from installing the cluster until the error happens.

Step 1: Installing the cluster

I'm traying to loops to dynamically add acl rules and get errors:

Error: Error in function call │ │ on ..\modules\acl\ressources.tf line 8, in resource "aws_network_acl" "pub-acl": │ 8: rule_no = element(ingress.value, 0) │ ├──────────────── │ │ ingress.value is "http" │ │ Call to function "element" failed: cannot read elements from string.

error details :

Any idea if possible to get the cidr block for the service endpoint