Well,

As attachments get larger, and end users use email rather than ftp for file 
transfer for convenience sake, a UDP implementation, perhaps using UDP as a 
data streaming channel could become a very useful configuration, and the 
transfer speed over high latency links (think satellite etc) could improve 
immensely.

T

-----Original Message-----
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] 
On Behalf Of Peter
Sent: Friday, 30 August 2013 12:15 PM
To: postfix-users@postfix.org
Subject: Re: newbie check Was [Re: port 25 submission settings sanity check]

On 08/30/2013 08:53 AM, Terry Gilsenan wrote:
> There are no MTAs that accept submission on UDP, yet, so maybe 
> reserved for future use?

No, it's just the assignment from IANA.  In the past when either a TCP or UDP 
port assignment was requested both were assigned, this does not mean that there 
is or ever was any intention to use the UDP port for the
service:
NOTE: URL removed for security purposes - contact terry.gilse...@interoil.com 
for support.

Note that this is no longer the case (as per section 7.2 of the same RFC above).


Peter



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