What is sendmail in Linux command?

What is sendmail in Linux command?

Updated: 11/06/2021 by Computer Hope. On Unix-like operating systems, sendmail is a general purpose e-mail routing facility that supports many kinds of mail-transfer and delivery methods, including the SMTP (Simple Mail Transfer Protocol) used for e-mail transport over the Internet.

How do I know if sendmail is working?

Type “ps -e | grep sendmail” (without quotes) at the command line. Press the “Enter” key. This command prints a listing that includes all running programs whose name contains the text “sendmail.” If sendmail is not running, there will be no results.

How do I configure sendmail?

Configuring sendmail

  1. Edit the /etc/sendmail.mc file. Most of what you need to do to configure sendmail can be done by editing this file.
  2. Generate the sendmail.cf file from the edited sendmail.mc file. This is done using the m4 processor.
  3. Review your sendmail.cf configuration.
  4. Restart the sendmail server.

Which is better postfix or sendmail?

Sendmail is known for being inefficient compared to competitors. System admins complain about random problems often and generally install Postfix or Exim. Both are drop-in replacements for Sendmail and are almost equal in terms of reliability. However, Postfix is one step ahead thanks to its modular architecture.

How do I send a test using Sendmail?

  1. 2 Answers. sendmail expects email in “raw” format. Usually it is better to use higher level commands e.g. mail .
  2. Using sendmail Command: Created a file with email content:
  3. Using ‘mail’ Command: $mail -s “Test Subject” [email protected] < /dev/null.
  4. Using ‘mutt’ command: $mutt -s “Test Email” [email protected] < /dev/null.

How do I view sendmail logs?

As others have noted below, on most systems it’s /var/log/maillog. On Solaris it’s /var/adm/maillog. On Debian/Ubuntu it’s /var/log/mail. log (note the dot).

What is the configuration file for Sendmail?

/etc/mail/sendmail.
The main configuration file for Sendmail is /etc/mail/sendmail.cf , which is not intended to be manually edited. Instead, make any configuration changes in the /etc/mail/sendmail.mc file.

Can you list the SMTP commands?

POP3, we explained that an SMTP session is a sort of a conversation between an SMTP client and an SMTP server. The client talks using commands that consist of alphabetical characters….Command-response.

Command Positive response Negative response
EXPN 250 252 502 504 550
HELP 211 214 502 504
NOOP 250 –
QUIT 221 –