It seems to have been a problem with the mail queue.  It could not resolve addresses, according to the log.  I could resolve addresses from the bash command line with "dig".  I restarted the server and manually flushed the queue from the web admin interface.

I think Surgemail did not come up properly after a recent power outage.  Anyway, seems to be working fine now.

Thanks,
John

On 1/15/20 7:23 PM, Surgemail Support wrote:
> Duplicates can be caused by
> 
>     1) file access errors.
> 
>     2) duplicate incoming messages - sometimes caused by outlook combined with a virus scanner issue.
> 
> 
> So check if msg*.rec shows the duplicates as 'arriving' more than once.  And check if there is some problem deleting messages from your inbox.
> 
> empty your inbox, then examine the file system to see if it's empty
> 
>     tellmail path user@xya.com
> 
>     cd (path)/mdir/new
> 
>     ls -al
> 
> ChrisP.
> 
> 
> On 16/01/2020 5:35 AM, John Wilkes wrote:
>> I've been getting duplicate messages since a recent power failure.  Thanks to a UPS, I shut down the mail server and mirror cleanly, so no crash.  It's only certain senders that seem to generate duplicates.  I've received five copies of some messages.
>>
>> Any ideas what could be causing this?
>>
>> Currently running version 7.3o4-4 on a Centos system.
>>

-- 
John Wilkes
john@wilkes.com

My life has been a series of tragedies and triumphs, but I wouldn't have it any other way.