Qmail send program

Qmail is a popular open-source mail transfer agent (MTA) that is known for its security, reliability, and flexibility. The qmail-send program is a part of the qmail suite and is responsible for sending emails.

Here are some key features and options of the qmail-send program:

Sending emails

• qmail-send is used to send emails from a qmail server to a remote mail server.
• It takes a message file as input and sends it to the specified recipient(s).
• The message file is typically created by the qmail-queue program, which is responsible for queuing messages for later delivery.

Options

• -f or --from: specifies the sender's email address.
• -t or --to: specifies the recipient's email address.
• -b or --body: specifies the message body.
• -s or --subject: specifies the message subject.
• -h or --help: displays the help message.

Example usage

Here's an example of how to use qmail-send to send an email:

qmail-send -f [email protected] -t [email protected] -b "Hello, world!" -s "Test email"

This command sends an email from [email protected] to [email protected] with the subject "Test email" and the message body "Hello, world!".

Security features

• qmail-send is designed with security in mind and includes features such as:
  • Authentication: qmail-send can authenticate with the remote mail server using various authentication mechanisms, such as SMTP AUTH or TLS.
  • Encryption: qmail-send can encrypt the email message using TLS or PGP.
  • Spam filtering: qmail-send can be configured to filter out spam emails using various spam filtering algorithms.

Integration with other qmail programs

• qmail-send is often used in conjunction with other qmail programs, such as qmail-queue, qmail-remote, and qmail-local.
• qmail-queue is responsible for queuing messages for later delivery, while qmail-remote is responsible for sending messages to remote mail servers. qmail-local is responsible for delivering messages to local users.

Overall, qmail-send is a powerful and flexible program that is widely used in email servers and is known for its reliability and security.