[Cialug] OT: email is not instant

[Nathan C. Smith]

Good stuff, thanks for that.  Probably stuff I should know in RFC 5321.



Nathan C. Smith
McKee, Voorhees & Sease, P.L.C. | 515-288-3667  |  nathan.smith at ipmvs.com


-----Original Message-----
From: cialug-bounces at cialug.org [mailto:cialug-bounces at cialug.org] On Behalf Of Nicolai
Sent: Friday, June 08, 2012 4:56 PM
To: Central Iowa Linux Users Group
Subject: Re: [Cialug] OT: email is not instant

On Fri, Jun 08, 2012 at 03:46:56PM -0500, Nathan C. Smith wrote:
> I found this and it is pretty good.   http://blog.aguk.net/email-is-not-instant

Yeah that's pretty good.

In addition and FWIW I'd encourage you to check RFC 5321 Section
4.5.3.2 on timeouts.

Initial 220 Message: 5 Minutes
MAIL Command: 5 Minutes
RCPT Command: 5 Minutes
DATA Initiation: 2 Minutes
Data Block: 3 Minutes
DATA Termination: 10 Minutes.

On a related note, stuttering and a decent greetdelay are highly effective antispam techniques.  For an example, 

telnet chocolatine.org 25

Try sending mail with SMTP commands :-)

People wouldn't like their inboxes if email was instantaneous.

Nicolai
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