add sqmail-4.2.29asqmail-4.2

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+.TH s/qmail: qmail-smtpam 8
+.SH NAME
+qmail-smtpam \- SMTP client PAM
+.SH SYNOPSIS
+.B qmail-smtpam
+.I host
+.I [s]port
+.SH DESCRIPTION
+.B qmail-smtpam
+reads an email address from FD 3
+and tries to verify this 
+connecting to the remote
+.IR host 
+on 
+.IR port .
+If 
+.I port 
+starts is 
+.I s
+\'implicit TLS\' ist used on that port.
+In a standard SMTP dialog,
+.B qmail-smtpam
+supplies the HELO greeting,
+a MAIL FROM: <> address, and
+the purported RCPT TO: <address>.
+.SH "CONTROL FILES"
+.TP 5
+.I domainips
+IP addresses to be used on outgoing connections.
+Each line has the form
+.IR domain\fB:\fIlocalip(%ifname)\fB|\fIhelohost ,
+without any extra spaces.
+If
+.I domain
+matches the domain part in
+.IR sender ,
+.B qmail-smtpam
+will bind to
+.IR localip
+when connecting to
+.IR host .
+LLU IPv6 addresses need to be appended with the binding
+.IR ifname
+following
+.IR localip
+with a '%'.
+If it matches, it will set the provided HELO string as greeting;
+otherwise, it will use the default.
+.TP 5
+.I helohost
+Current host name,
+for use solely in saying hello to the remote SMTP server.
+Default:
+.IR me ,
+if that is supplied;
+otherwise
+.B qmail-smtpam
+refuses to run.
+.TP 5
+.I timeoutconnect
+Number of seconds
+.B qmail-smtpam
+will wait for the remote SMTP server to accept a connection.
+Default: 60.
+The kernel normally imposes a 75-second upper limit.
+.TP 5
+.I timeoutremote
+Number of seconds
+.B qmail-smtpam
+will wait for each response from the remote SMTP server.
+Default: 1200.
+.TP 5
+.I tlsdestinations
+If present, this file advices
+.B qmail-smtpam
+to use TLS encryption for specific destination domains
+as provided by the forward-path and perhaps to validate/verify
+the domain's server certificate:
+.IR destination:cafile|verifydepth;[s]port|ciphers|domain .
+If
+.I port
+is give as or prepended with
+.I s
+\'implict TLS\' is used; omitting StartTLS.
+Unless explicitely configured,
+.B qmail-smtpam
+accepts any or no certificate provided by the server,
+thus uses TLS for encryption only.
+.B qmail-smtpam
+uses the same certificate validation/verification 
+mechanism as
+.B qmail-remote
+except for distinguishing among the sender's domain information.
+.SH "RETURN CODES"
+.B qmail-smtpam
+exits 
+.I 0 
+if the remote server
+replies with '250', otherwise 
+.IR 1 .
+In case the control files can not
+be read or a communication problem has
+occured, it exits
+.IR 111 .
+.SH "SEE ALSO"
+addresses(5),
+envelopes(5),
+qmail-control(5),
+qmail-remote(8),
+qmail-smtpd(8)