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Full Discussion: Alternative to Port 25
Special Forums IP Networking Alternative to Port 25 Post 302306834 by pludi on Tuesday 14th of April 2009 01:43:30 AM
Old 04-14-2009
You could use SMTPS on port 465 instead, but be aware that if your server should work as an internet MX, port 25 has to be reachable, since there's no way to embed port information in the DNS record.
 

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socket_from_name(3ncs)													    socket_from_name(3ncs)

Name
       socket_from_name - convert a name and port number to a socket address

Syntax
       #include <idl/c/socket.h>

       void socket_$from_name(family, name, nlength, port, sockaddr, slength,				status)
       unsigned long family;
       socket_$string_t name;
       unsigned long nlength;
       unsigned long port;
       socket_$addr_t *sockaddr;
       unsigned long *slength;
       status_$t *status;

Arguments
       family The  integer  representation  of	an  address  family.   Value  can be socket_$internet or socket_$unspec If the family parameter is
	      socket_$unspec, then the name parameter is scanned for a prefix of family: (for example, ip:).

       name   A string in the format family:host[port], where family:, host, and [port] are all optional.  The family is an address  family.   The
	      only  valid  family  is  ip.   If  you specify a family as part of the name parameter, you must specify socket_$unspec in the family
	      parameter.  The host is a host name.  A leading number sign (#) can be used to indicate that  the  host  name  is  in  the  standard
	      numeric  form (for example, #192.9.8.7).	If host is omitted, the local host name is used.  The port is a port number.  If you spec-
	      ify a port as part of the name parameter, the port parameter is ignored.

       nlength
	      The length, in bytes, of name.

       port   A port number.  If you specify a port number in the name parameter, this parameter is ignored.

       sockaddr
	      A socket address.

       slength
	      The length, in bytes, of sockaddr.

       status The completion status. If the completion status returned in is equal to status_$ok , then the routine that supplied it was  success-
	      ful.

Description
       The  routine converts a textual address family, host name, and port number to a socket address.	The address family and the port number can
       be either specified as separate parameters or included in the name parameter.

Files
See Also
       intro(3ncs), socket_family_from_name(3ncs), socket_to_name(3ncs)

															    socket_from_name(3ncs)
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