Linux command
sendmail 命令
网络
涉及管道、覆盖或删除，执行前请先确认路径和参数。
常用示例
Send an email
echo "Message body" | sendmail [recipient@example.com]
Send email with subject
printf "Subject: Test\n\nMessage body" | sendmail [recipient@example.com]
Send email from a file
sendmail [recipient@example.com] < [message.txt]
Process mail queue
sendmail -q
Display mail queue
sendmail -bp
Test configuration
sendmail -bv [recipient@example.com]
说明
sendmail is the traditional Unix mail transfer agent (MTA) interface. While the original sendmail program is complex, most Linux systems use compatible alternatives (Postfix, Exim) that provide the same command-line interface. The command accepts a message on standard input and delivers it to the specified recipients. Headers can be included in the input; if -t is used, recipients are read from the To/Cc/Bcc headers instead of command-line arguments. For simple email sending, the message format includes optional headers followed by a blank line and the body. Headers like Subject:, From:, To: are standard. The mail queue holds messages awaiting delivery. Use -q to trigger queue processing and -bp (or mailq) to view queue status.
参数
- -t
- Read recipients from message headers (To:, Cc:, Bcc:)
- -f _address_
- Set envelope sender address
- -F _name_
- Set full name of sender
- -i
- Ignore dots alone on lines
- -q
- Process saved messages in queue
- -bp
- Print mail queue summary
- -bv
- Verify addresses without sending
- -bd
- Run as daemon
- -bs
- Use SMTP protocol on stdin/stdout
- -v
- Verbose mode
- -O _option_=_value_
- Set mail server option
FAQ
What is the sendmail command used for?
sendmail is the traditional Unix mail transfer agent (MTA) interface. While the original sendmail program is complex, most Linux systems use compatible alternatives (Postfix, Exim) that provide the same command-line interface. The command accepts a message on standard input and delivers it to the specified recipients. Headers can be included in the input; if -t is used, recipients are read from the To/Cc/Bcc headers instead of command-line arguments. For simple email sending, the message format includes optional headers followed by a blank line and the body. Headers like Subject:, From:, To: are standard. The mail queue holds messages awaiting delivery. Use -q to trigger queue processing and -bp (or mailq) to view queue status.
How do I run a basic sendmail example?
Run `echo "Message body" | sendmail [recipient@example.com]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -t do in sendmail?
Read recipients from message headers (To:, Cc:, Bcc:)