forked from pifty/tutes-dump
20 lines
1.1 KiB
Plaintext
Executable File
20 lines
1.1 KiB
Plaintext
Executable File
[09] WHY IS INCOMING EMAIL SOMETIMES DELAYED? WHERE IS MY MAIL?
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SDF has used UUCP (UNIX to UNIX CoPy) to transfer both incoming
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and outgoing mail since the late 1980s. This is referred to as
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a 'Store and Forward' method, so it is not always instantaneous.
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SDF does receive email directly using SMTP, but at the same
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time also uses a secondary host which queues up email via UUCP
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for pick up each hour via 'uucico' using the 't' protocol. The
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result: sometimes you get your mail in a few seconds, sometimes
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you have to wait a bit. This also means that if for some reason
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the primary SMTP server at SDF is down, offline for maintenance
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or on fire, email will still be written to an SDF UUCP queue for
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future delivery rather than sit waiting in a foreign outbound
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SMTP queue where it may be deleted or returned.
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All SDF hosted email domains use the SMTP primary and UUCP secondary
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MX (Mail eXchanger) method with the except of VHOSTed domains which
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have the option to use the UUCP secondary via 'mkvhost'.
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