How to send a mail using postfix

Postfix is a popular open-source mail transfer agent (MTA) that can be used to send and receive emails. Here's a step-by-step guide on how to send a mail using Postfix:

Prerequisites:

Postfix is installed and configured on your system.
You have a valid email account and a mail server (e.g., Gmail, Outlook, etc.).
You have a text editor or a terminal emulator.

Step 1: Create a mail message

Open a text editor or a terminal emulator and create a new file with a .txt extension (e.g., mail.txt). Add the following information:

From: Your email address (e.g., [email protected])
To: The recipient's email address (e.g., [email protected])
Subject: The subject of the email (e.g., Test Email)
Body: The body of the email (e.g., This is a test email sent using Postfix)

Here's an example:

From: [email protected]
To: [email protected]
Subject: Test Email
This is a test email sent using Postfix

Step 2: Save the mail message

Save the file with the .txt extension (e.g., mail.txt).

Step 3: Use Postfix to send the mail

Open a terminal emulator and navigate to the directory where you saved the mail message file. Use the following command to send the mail:

postfix sendmail -f [email protected] -t [email protected] < mail.txt

Replace [email protected] with your actual email address, [email protected] with the recipient's email address, and mail.txt with the name of your mail message file.

Step 4: Verify the mail delivery

Check your email account to verify that the mail has been delivered successfully. You can also use the postfix -v command to view the mail delivery logs.

Tips and Variations:

You can use the -i option to specify the input file instead of reading from standard input:
```
postfix sendmail -f [email protected] -t [email protected] -i mail.txt
```

You can use the -s option to specify the subject of the email:

postfix sendmail -f [email protected] -t [email protected] -s "Test Email" < mail.txt

You can use the -b option to specify the body of the email:
```
postfix sendmail -f [email protected] -t [email protected] -b "This is a test email sent using Postfix" < mail.txt
```
Remember to replace the placeholders with your actual email addresses and file names.

Mail Knowledge

How to send a mail using postfix