

The simplest solution then would be to close Mail altogether when I’m not using it. Given that even my primary email gets at least a couple of hundred emails per day, that’s more workstops than I’m willing to put up with. On the other hand, with my primary account as IMAP on IDLE that meant every time I received a single email all my spam filters and Smart Mailboxes updates ran each time. Normally I check my email manually only which means these updates don’t happen very often and happen at a time when I’m working in Mail and am not surprised or bothered by 15 seconds of sluggishness. These Smart Mailboxes get updated every time you get even one new email. Some of these mailboxes have many thousands of messages. At a glance, I can see how business is going (don’t forget to weed out automated tests occasionally). I have a lot of Smart Mailboxes (great feature, btw) which allow me to check how many leads each of my clients received this week and this year.
#SPAMSIEVE MACMAIL FOLDERS NOT SHOWING ON OTHER COMPUTER UPDATE#
Every time you get new mail your Smart Mailboxes folders update their unread counts: “Updating Smart Mailbox Unread Counts” is the message you will see in Mail’s Activity Monitor. The problems turns out to be something else altogether:

I initially thought the issue was with Rules, as I have SpamSieve and many dozens of rules to deal with bulk email (things I might want to read but don’t want in my InBox). I’m new to IMAP so I decided to dig deeper. The problem seemed to be around Apple Mail. I have separated my email from bulk email effectively now, but still found my computer sluggish. As I’ve mentioned, I handle hundreds of messages per day for myself and my clients.
