To prevent abuse and don’t allow to send bulk emails through SMTP server, it is recommended to restrict the number of messages that each user can send. Let’s say we have limited the number of messages to send, but how can we check that the limitation works? The best way to make such check is […]
Postfix: Gmail as Relay – Linux Mint/Ubuntu/Debian
Many ISPs block sending email over port 25. This means that you won’t be able to send mail directly from your Linux server. A good way to get around this limitation is to set up a relay through a Gmail account. 1. Install the Required Packages Execute the following command to install required packages: $ […]
HowTo: Retrieve Email from a POP3 Server using the Command Line
The POP3 (Post Office Protocol Version 3) is an application-layer Internet standard protocol used by local Email clients to retrieve Email from a remote server over a TCP/IP connection. This tutorial shows how to connect to POP3 mail server and manage incoming Email using the ‘telnet’ command. Step 1: Open a connection from your computer […]
HowTo: Send Email from an SMTP Server using the Command Line
The SMTP (Simple Mail Transfer Protocol) is an Internet standard for electronic mail (Email) transmission across Internet Protocol (IP) networks. This tutorial shows how to connect to SMTP mail server and send an Email using the ‘telnet’ command. Step 1: Open a connection from your computer to an SMTP mail server $ telnet smtp.domain.ext 25 […]