SMTP retrys on failure -- General Question about rfc.
We lost our network connection recently for about an hour and
I was going to explain to someone how mail servers work when
it came apparent that I did not know the exact retry rate that
other MTA servers use.
So, I have been looking for information on mail server (MTA) retries. There
does not seem to be any standard except 5 days seems to be the max. Am I
right here ?
Does anyone know if there is an RFC for mail servers regarding
mail retries ?
I found this but it does not explain the details:
http://www.faqs.org/rfcs/rfc1894.html
What is the typical retry rate for most mail servers out there ?
I.E. MS Exchange,
Sendmail,
Etc.
I use the Postfix MTA, mine seems to say 'try to resend every 1000
seconds for 5 days':
postconf | grep -i queue
maximal_queue_lifetime = 5d
queue_run_delay = 1000s
Here is a [Random] Exim Config which specifies the MTA a retry rate
diffently:
# begin retry
# Domain Error Retries
* * F,2h,15m; G,16h,2h,1.5; F,4d,8h
# This single retry rule applies to all domains and all errors. It
# specifies retries every 15 minutes for 2 hours, then increasing retry
# intervals starting at 2 hours and increasing each time by a factor of 1.5, up to
# 16 hours, then retries every 8 hours until 4 days have passed since
# the first
--
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Ted Knab
Chester, MD 21619
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11001110001011100000010010000110000001001011011010010110
11100110010011101000011000101110111101100100111010011110
00000100001101101001011001100110101001100110011011110110
01001110101101100000010011101110100101100010111000010110
00000100100001100000010000101110010011101111011000001110
10010110110011101011011000000100011001101111011001001110
00000100110001101111011010110110000011101010111000101110
1010011001001110110011100111010001010000
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