SWAKS - linux cli mail client

 SWAKS(1)                                                                   SWAKS                                                                  SWAKS(1)

NAME
       swaks - Swiss Army Knife SMTP, the all-purpose smtp transaction tester

DESCRIPTION
       swaks' primary design goal is to be a flexible, scriptable, transaction-oriented SMTP test tool.  It handles SMTP features and extensions such as
       TLS, authentication, and pipelining; multiple version of the SMTP protocol including SMTP, ESMTP, and LMTP; and multiple transport methods
       including unix-domain sockets, internet-domain sockets, and pipes to spawned processes.  Options can be specified in environment variables,
       configuration files, and the command line allowing maximum configurability and ease of use for operators and scripters.

QUICK START
       Deliver a standard test email to user@example.com on port 25 of test-server.example.net:

        swaks --to user@example.com --server test-server.example.net

       Deliver a standard test email, requiring CRAM-MD5 authentication as user me@example.com.  An "X-Test" header will be added to the email body.  The
       authentication password will be prompted for.

        swaks --to user@example.com --from me@example.com --auth CRAM-MD5 --auth-user me@example.com --header-X-Test "test email"

       Test a virus scanner using EICAR in an attachment.  Don't show the message DATA part.:

        swaks -t user@example.com --attach - --server test-server.example.com --suppress-data </path/to/eicar.txt

       Test a spam scanner using GTUBE in the body of an email, routed via the MX records for example.com:

        swaks --to user@example.com --body /path/to/gtube/file

       Deliver a standard test email to user@example.com using the LMTP protocol via a UNIX domain socket file

        swaks --to user@example.com --socket /var/lda.sock --protocol LMTP

       Report all the recipients in a text file that are non-verifyiable on a test server:

        for E in `cat /path/to/email/file`
        do
            swaks --to $E --server test-server.example.com --quit-after RCPT --hide-all
            [ $? -ne 0 ] && echo $E
        done