[PLUG] Incoming mail not delivered to inbox: how to find why

[Rich Shepard]

On Tue, 16 Jan 2018, Rich Shepard wrote:

> Another new experience: this morning my inbox had no new messages. Even
> with no external senders, reports from logwatch, pflogsumm, and dirvish
> backups have always been delivered. A test message from my personal domain
> to my business domain also was not delivered.

   Additional information: restarting postfix makes no difference.
/var/spool/mail/rshepard was last accessed yesterday at 12:30 pm:

-rw-rw---- 1 rshepard mail 207100 Jan 15 12:30 rshepard

so that must be when the stoppaged occured.

   Ideas, please.

Rich