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A comment on Ask HN: Is it possible to run your own mail server for personal use?. Parent comment

Re:Ask HN: Is it possible to run your own mail server for pe... by robertely on Sunday August 14, 2016 @12:34AM (#12284275)
That's why you soft bounce. It tells the sender that you can't receive the email _at this time_.
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Re:Ask HN: Is it possible to run your own mail server for pe... by philtar on Sunday August 14, 2016 @04:37AM (#12284805)
Pretty sure you can't do anything when you're not connected to the internet.
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Re:Ask HN: Is it possible to run your own mail server for pe... by sbierwagen on Sunday August 14, 2016 @03:20PM (#12286892)
A connection timeout is a soft bounce.

https://tools.ietf.org/html/rfc5321#section-4.5.4.1

   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.  It MAY
   be appropriate to set a shorter maximum number of retries for non-
   delivery notifications and equivalent error messages than for
   standard messages.  The parameters to the retry algorithm MUST be
   configurable.
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Re:Ask HN: Is it possible to run your own mail server for pe... by bigp3t3 on Sunday August 14, 2016 @09:12AM (#12285443)
That's why sending mta's should resend. Think sendmail does this every few hours or so
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