For the first time, after setting up several Zimbra servers, I've now migrated over our own company's internal mail server over to Zimbra and have myself become a user.

The first, most annoying thing I noticed was that as soon as you click on an email in the web interface it is immediately marked as read. This also actually happens to the first message when you log in and the top message in each "page" of messages as you scroll through them. This leads to the possibility of accidentally marking emails as read without noticing you have done it and therefore missing the message altogether. The "conversations" style method of viewing messages is not an option. Isn't there some way to not mark messages as read until they have been specifically marked as read, or maybe not for 60 seconds or something, like most other email clients?