Sending emails via command line: Difference between revisions
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==Logging in to the router== | ==Logging in to the router== | ||
Once you have all the necessary email information, choose your | Once you have all the necessary email information, choose your favorite method of sending command line queries or the one that is currently available to you and log in to your router accordingly. The most common methods of doing so are '''[[CLI]]'''('''Command Line Interface''') and '''SSH'''. | ||
'''Note''': in further examples of this guide we will be demonstrating how to send email using SSH. Feel free to follow the guide step by step whichever method you choose, because the commands used are identical and the only thing that is different is the GUI (Graphical User Interface). | '''Note''': in further examples of this guide we will be demonstrating how to send email using SSH. Feel free to follow the guide step by step whichever method you choose, because the commands used are identical and the only thing that is different is the GUI (Graphical User Interface). | ||
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*Next, navigate to the '''System''' | *Next, navigate to the '''System''' → '''Maintenance''' → '''CLI''' option from the drop-down list: | ||
[[File: | [[File:Send_email_via_cli7.8.png|border|class=tlt-border]] | ||
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This method is useful when sending short emails. As an example, lets send an email containing the message "'''Hello, JustTesting'''", from the hypothetical address '''[email protected]''' to '''[email protected]''' using Gmail's SMTP settings: | This method is useful when sending short emails. As an example, lets send an email containing the message "'''Hello, JustTesting'''", from the hypothetical address '''[email protected]''' to '''[email protected]''' using Gmail's SMTP settings: | ||
:~# echo -e "subject:Test\nfrom:[email protected]\nHello,\n\nJustTesting" | sendmail -v -H "exec openssl s_client -quiet -connect smtp.gmail.com:587 - | :~# echo -e "subject:Test\nfrom:[email protected]\nHello,\n\nJustTesting" | sendmail -v -H "exec openssl s_client -quiet -connect smtp.gmail.com:587 -tls1_3 -starttls smtp" -f [email protected] -au"[email protected]" -ap"senders.email.password" [email protected] | ||
Let's examine this command in detail. First, this part: | Let's examine this command in detail. First, this part: | ||
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So in short, the part beginning with '''echo''' and ending just before the column ('''|''') represents the email's header and body of text. Now lets examine the next part (the one that begins after the column): | So in short, the part beginning with '''echo''' and ending just before the column ('''|''') represents the email's header and body of text. Now lets examine the next part (the one that begins after the column): | ||
'''sendmail <span style=color:green>-v -H</span> "<span style=color:blue>exec openssl s_client -quiet -connect smtp.gmail.com:587 - | '''sendmail <span style=color:green>-v -H</span> "<span style=color:blue>exec openssl s_client -quiet -connect smtp.gmail.com:587 -tls1_3 -starttls smtp</span>" <span style=color:red>-f [email protected]</span> <span style=color:purple>-au"[email protected]" -ap"senders.email.password"</span> <span style=color:brown> [email protected]</span>''' | ||
* <span style=color:green>'''-v'''</span> - verbose mode | * <span style=color:green>'''-v'''</span> - verbose mode | ||
* <span style=color:green>'''-H'''</span> - runs connection helper; connection helper allows you to specify additional commands regarding the email (in this case, OpenSSL connection information) | * <span style=color:green>'''-H'''</span> - runs connection helper; connection helper allows you to specify additional commands regarding the email (in this case, OpenSSL connection information) | ||
* <span style=color:blue>'''exec openssl s_client -quiet -connect smtp.gmail.com:587 - | * <span style=color:blue>'''exec openssl s_client -quiet -connect smtp.gmail.com:587 -tls1_3 -starttls smtp'''</span> - OpenSSL connection information; <span style=color:blue>'''smtp.gmail.com:587'''</span> specifies the SMTP server and port. Replace this with email service provider's SMTP settings | ||
* <span style=color:red>'''-f [email protected]'''</span> - sender's email address. This should correspond with the '''from:''' part in the echo command | * <span style=color:red>'''-f [email protected]'''</span> - sender's email address. This should correspond with the '''from:''' part in the echo command | ||
* <span style=color:purple>'''-au"[email protected]" -ap"senders.email.password"'''</span> - what follows after <span style=color:purple>'''-au'''</span> inside the quotation marks is the email service's login user name and by analogy <span style=color:purple>'''-ap'''</span> specifies the email service's login password (<span style=color:purple>'''[email protected]'''</span> and <span style=color:purple>'''senders.email.password'''</span>, in this case) | * <span style=color:purple>'''-au"[email protected]" -ap"senders.email.password"'''</span> - what follows after <span style=color:purple>'''-au'''</span> inside the quotation marks is the email service's login user name and by analogy <span style=color:purple>'''-ap'''</span> specifies the email service's login password (<span style=color:purple>'''[email protected]'''</span> and <span style=color:purple>'''senders.email.password'''</span>, in this case) | ||
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This next method is superior when sending longer messages. Instead of using the echo command, we'll store our email header and body information into a text file. Just as in the example above, let's send an email from the hypothetical address '''[email protected]''' to '''[email protected]''' using Gmail's SMTP settings, but without using echo: | This next method is superior when sending longer messages. Instead of using the echo command, we'll store our email header and body information into a text file. Just as in the example above, let's send an email from the hypothetical address '''[email protected]''' to '''[email protected]''' using Gmail's SMTP settings, but without using echo: | ||
:~# sendmail -v -H "exec openssl s_client -quiet -connect smtp.gmail.com:587 - | :~# sendmail -v -H "exec openssl s_client -quiet -connect smtp.gmail.com:587 -tls1_3 -starttls smtp" <span style=color:red>'''</tmp/mail.txt'''</span> -f [email protected] -au"[email protected]" -ap"pass" [email protected] | ||
As you can see, instead of echo, we're using <span style=color:red>'''</tmp/mail.txt'''</span>, which is the path to the '''mail.txt''' file that stores the email's header and body. This file does not exist in the router, therefore, you should create it yourself. To create a file, use the '''touch''' command: | As you can see, instead of echo, we're using <span style=color:red>'''</tmp/mail.txt'''</span>, which is the path to the '''mail.txt''' file that stores the email's header and body. This file does not exist in the router, therefore, you should create it yourself. To create a file, use the '''touch''' command: | ||