Exchange - Duplicated "Exchange Delegation Federation" certificates
Recently, I encountered an interesting scenario in which an "Exchange Delegation Federation" certificate on one of our Exchange servers appeared to be duplicated.
Exchange - Free up space removing old versions of OWA
Managing your Exchange Server efficiently is crucial for optimizing storage space. It's not uncommon for the "Owa\prem" folder to accumulate
Security - Remove sensitive data from headers in Postfix
Email headers can provide sensitive and valuable information.
For security purposes it is highly recommended to avoid sending private IP addresses, versions, etc...
Example email
Linux - Exim: Authenticated and TLS mail through smarthost
Exim is a very flexible and common MTA (mail transfer agent) in Unix systems.
This posts shows the way to configure Exim as client to