sendmail

Send email. More information: https://manned.org/sendmail.

• Send a message with the content of message.txt to the mail directory of local user username:

sendmail username < message.txt

• Send an email from [email protected] (assuming the mail server is configured for this) to [email protected] containing the message in message.txt:

sendmail -f [email protected] [email protected] < message.txt

• Send an email from [email protected] (assuming the mail server is configured for this) to [email protected] containing the file file.zip:

sendmail -f [email protected] [email protected] < file.zip