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CentOS 7.0 - man page for smtptest (centos section 1)

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SMTPTEST(1)									      SMTPTEST(1)

 *

NAME
       smtptest - interactive SMTP test program

SYNOPSIS
       smtptest [ -t keyfile ] [ -p port ] [ -m mechanism ]
		[ -a userid ] [ -u userid ] [ -k num ] [ -l num ]
		[ -r realm ] [ -f file ] [ -n num ] [ -s ] [ -c ]
		[ -i ] [ -o option=value ] [ -v ] hostname

DESCRIPTION
       smtptest  is  a utility that allows you to authenticate to a SMTP server and interactively
       issue commands to it. Once authenticated you may issue any SMTP command by  simply  typing
       it  in.	It  is	capable of multiple SASL authentication mechanisms and handles encryption
       layers transparently. This utility is often used for  testing  the  operation  of  a  smtp
       server. Also those developing SMTP clients find it useful.

OPTIONS
       -t keyfile
	      Enable TLS.  keyfile contains the TLS public and private keys.  Specify "" to nego-
	      tiate a TLS encryption layer but not use TLS authentication.

       -p port
	      Port to connect to. If left off this defaults to smtp as defined in /etc/services.

       -m mechanism
	      Force smtptest to use mechanism for authentication. If not specified the	strongest
	      authentication mechanism supported by the server is chosen.

       -a userid
	      Userid to use for authentication; defaults to the current user.  This is the userid
	      whose password or credentials will be presented to the server for verification.

       -u userid
	      Userid to use for authorization; defaults to the current user.  This is the  userid
	      whose  identity will be assumed after authentication.  NOTE: This is only used with
	      SASL mechanisms that allow proxying (e.g. PLAIN, DIGEST-MD5).

       -k num Minimum protection layer required.

       -l num Maximum protection layer to use (0=none; 1=integrity; etc).  For example if you are
	      using  the KERBEROS_V4 authentication mechanism specifying 0 will force smtptest to
	      not use any layer and specifying 1 will force it to use the  integrity  layer.   By
	      default the maximum supported protection layer will be used.

       -r realm
	      Specify  the  realm to use. Certain authentication mechanisms (e.g. DIGEST-MD5) may
	      require one to specify the realm.

       -f file
	      Pipe file into connection after authentication.

       -n num Number of authentication attempts; default = 1.  The  client  will  attempt  to  do
	      SSL/TLS session reuse and/or fast reauth (e.g. DIGEST-MD5), if possible.

       -s     Enable SMTP over SSL (smtps).

       -c     Enable  challenge  prompt  callbacks.  This will cause the OTP mechanism to ask for
	      the the one-time password instead of the secret pass-phrase (library generates  the
	      correct response).

       -i     Don't  send  an  initial	client response for SASL mechanisms, even if the protocol
	      supports it.

       -o option=value
	      Set the SASL option to value.

       -v     Verbose. Print out more information than usual.

SEE ALSO
       sendmail(8)

CMU					  Project Cyrus 			      SMTPTEST(1)
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