smtp – POFTUT

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How To Use Sendmail Command On Linux Tutorial with Examples?

sendmail is a mail transfer agent (MTA) used to send emails between computer systems by using simple mail transfer protocol (SMTP) . Sendmail project can be accessed from <a href=”http://www.sendmail.org”>www.sendmail.org</a> <h1>Install On Ubuntu, Debian, Mint, Kali</h1>sendmail  tool is provided by different packages on Ubuntu, Debian,Mint, Kali ordebbased distributions. In this case, we...

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How To Specify Host, Port and Protocol For Tcpdump?

Tcpdump is everyday tool used by system and network administrator. We generally look simple use cases like host, port and protocol filter for tcpdump . In this tutorial we will look how to filter host, port and protocol in tcpdump. But keep in mind that tcpdump will requires administrator or root...

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How To Use OpenSSL s_client To Check and Verify SSL/TLS Of HTTPS Webserver?

OpenSSL provides different features and tools for SSL/TLS related operations. s_lient is a tool used to connect, check, list HTTPS, TLS/SSL related information. Simply we can check remote TLS/SSL connection with s_client . In this tutorials we will look different use cases of s_client . Check TLS/SSL Of Website The basic and most...

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Linux mail and mailx Commands Tutorial With Examples and Send Email From Command Line

Linux have a lot of tools, services and applications related email. Email have different architecture than standard client server. We will look an command line based mailing application named mailx. mailx more advanced version of the mail tool. General Concept As stated in previous paragraph email systems are bit more complex than...

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