Sorry to hear you're having trouble with this! Did this domain/server get upgraded from earlier versions of SmarterMail like v15/v16 by chance, or was this native to the build versions we operate on currently? I might open up a ticket with you on this so we can help get to the bottom of it if that's alright?

@Kyle Kerst

This server was originally installed in version 7859, then updates were made to versions 8657, 8930, 8965, 8971 and finally 8972, in that order.

Perfect, thank you! I'm going to do some testing to see if I can get this replicated and escalated to our developers for review.

I was able to get this replicated in-house and I'll get it written up for our development team now. 

@Kyle Kerst,

Thanks. 

I will wait for the correction to be applied to our servers.

You're very welcome, happy to help out! We did get a fix implemented for this so once we finish up our QC we should have a new public release out that includes this fix in the near future!