At 03:08 -0500 on 11/18/2007, John C Klensin wrote about Re: 2821bis
consideration - New 2nd attempt Retry Strategy :
--On Saturday, 17 November, 2007 21:54 -0500 "Robert A.
Rosenberg" <hal9001(_at_)panix(_dot_)com> wrote:
At 00:20 -0800 on 11/17/2007, SM wrote about Re: 2821bis
consideration - New 2nd attempt Retry Strategy :
It's only a lot of retries over four or five days if you
retry too frequently. Some view the period as too long. A
two-day give-up period, for example, may result in delivery
issues being missed if it falls over a weekend
You need at least 4 days to handle 3 day weekends (a holiday
on Friday or Monday) although I've seen 4 day Holidays (Xmas
and New Years on a Friday and the company shutting down at
Noon on Thursday). A better idea is to use 3 days BUT adjust
it to 4 or 5 days when there is a Friday/Monday holiday
(although that can still run into problems since it is US
Centric and can run afoul of Non-US Holidays).
And that is exactly why the guidance in the spec says what it
does.
john
My comment was specifically directed to the suggestion to trim the
give-up period back to 2 days. I pointed out that weekends are not
the only problem with 2 days. If someone DOES decide that 2 days is
enough, that should be defined as 2 business days and automatically
adjusted when 2 business days spans more than 2 calender days. IOW:
Account for Holidays and Weekends that fall during the next 2
calender days (ie: Set the give-up date on a message to 2 calender
days after submission). This still is US Centric about Holidays but
it does allow for the shortened give-up period when it will not run
into problems.