MTA advice ??

Matthew Seaman m.seaman at
Mon Aug 25 05:50:13 UTC 2008

Jeffrey Goldberg wrote:

> Receiving mail directly will be more possible, but tricky.  You will 
> need to use a dynamic DNS system.  Also do consider uptime and 
> reliability.  In the old days, if one MTA couldn't reach another it 
> would hold stuff in its queue for four or five days.  Now, most MTAs 
> appear to be configured to give up after 24 hours.  So if your 
> mailserver is down for a day, mail will be bounced and never delivered 
> to you.

In which case those mail systems are not in compliance with the RFCs. 

RFC 2821 Section says:

   Retries continue until the message is transmitted or the sender gives
   up; the give-up time generally needs to be at least 4-5 days.  The
   parameters to the retry algorithm MUST be configurable.

ie. 4-5 days is the /minimum/ time to hold messages in the queue and
keep retrying.



Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP:     Ramsgate
                                                  Kent, CT11 9PW

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