I am having the same issue for a few days. I was not able to find any solution  setup printer

This was a case of the client not only using Outlook, but also webmail, AND iPhone  to access their mailbox in Smartmail.   All were IMAP, and since the iPhone had a settings slider for "remove deleted mail after:  7 days"    it was removing this each time she checked her mail on the iPhone, and then imap made sure everywhere else did that same.

Many thanks Stefano.

Hi Stephen,

glad to help you. It had happened the same things to some of our clients.

BTW, I've suggested to every client to NOT use the "deleted items" folder as an archive.

Ciao!

Stefano, 

 OK,  that is interesting.  In this case,  what settings would you suggest?  Or, what do others consider best practice?    We currently provide unlimited storage for our client mail, and advise them never to get rid of mail permanently, as a benefit to them.

Here is how I currently recommend setup for them,   on an iPhone:

I'm not a mail expert or SmarterMail expert.  If we want clients to be able to keep all mail going backward, making it all searchable, what would be a better setup?

Regards,

Stephen

Hi Stephen,

I would just tell to the clients that if they want to archive something, just use a folder created by themselves.

If you throw something in your trash bin, it'd be emptied sooner or later, that's the same about deleted items.

Gmail does the same, it deletes all the messages older than 30 days by default.

It's not something about SmarterMail, it's sth about clients' mind

Ciao!