Re: [Assp-user] Mailhop Backup MX?

[Micheal E. Jr <mi...@es...>]

Interesting!  I don't agree with the time-limit, but its an interesting
reference.  I haven't found the 4-5 day limit to be acceptable in at
least 10 years.

Charles Marcus wrote:
> RFC 2821 - http://www.faqs.org/rfcs/rfc2821.html
>
> 4.5.4.1 Sending Strategy
>
>    The general model for an SMTP client is one or more processes that
>    periodically attempt to transmit outgoing mail.  In a typical system,
>    the program that composes a message has some method for requesting
>    immediate attention for a new piece of outgoing mail, while mail that
>    cannot be transmitted immediately MUST be queued and periodically
>    retried by the sender.  A mail queue entry will include not only the
>    message itself but also the envelope information.
>
>    The sender MUST delay retrying a particular destination after one
>    attempt has failed.  In general, the retry interval SHOULD be at
>    least 30 minutes; however, more sophisticated and variable strategies
>    will be beneficial when the SMTP client can determine the reason for
>    non-delivery.
>
>    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.
>
>
>