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noddy_smtp_client

This is a very very noddy/simply SMTP client...I use the words SMTP client loosely.

It'll establish an insecure connection to your specified SMTP server on the specified port and at a very basic level allow you to send an email.

To compile: gcc noddy_smtp_client

To run: ./a.out <smtp server> <port>

Following https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol#SMTP_transport_example

we see

S: 220 smtp.example.com ESMTP Postfix

C: HELO relay.example.org

S: 250 Hello relay.example.org, I am glad to meet you

C: MAIL FROM:[email protected]

S: 250 Ok

C: RCPT TO:[email protected]

S: 250 Ok

C: RCPT TO:[email protected]

S: 250 Ok

C: DATA

S: 354 End data with .

C: From: "Bob Example" [email protected]

C: To: "Alice Example" [email protected]

C: Cc: [email protected]

C: Date: Tue, 15 Jan 2008 16:02:43 -0500

C: Subject: Test message

C:

C: Hello Alice.

C: This is a test message with 5 header fields and 4 lines in the message body.

C: Your friend,

C: Bob

C: .

S: 250 Ok: queued as 12345

C: QUIT

S: 221 Bye

{The server closes the connection}

The noddy_smtp_client will support the above.

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