Syncing still not finished afer 36 hours

[falesia]

I am trying to get Z Desktop going on this Debian Linux OS. Everything seemed to be OK until it started syncing my mail accounts. There are three - one webmail with mail.com, one on my own site hosting, and a Gmail one.

Whilst I am aware that there is a warning that this can take several hours, I had to turn the computer off after it was still not finished after 36 hours.

Is this normal?

Thanks for any suggestions