I belong to several author groups and receive countless emails a day because I am on their distribution list. In the group membership, I may choose to  receive individual email messages  posted to the group instead of choosing to get the digest version. Digest is a smart choice when you want to get all the email messages from a specified period of time combined into one email. Still, I am on the "individual email" setting for many. Sometimes the numerous messages are riveting and filled with information that I need to know. Other times? Not so much.  

I use Gmail for my personal and author email.  Here is a feature that I use for email threads that no longer interest me. Gmail allows you to mute a conversation. By muting, you are not deleting it but skipping the inbox where you don't see it. It will be saved in the Archives.

When you select an email to read it, you can then click the MORE button on the menu at the top. Mute is the last choice on the menu that drops. Click Mute and all the subsequent emails will skip the inbox. If for some reason, a new email in that conversation is addressed specifically TO: your mail as opposed to the group, it will pop back up.  Also, I have filter set up in my email where certain emails will automatically be marked with a colored label or skip my Inbox and go straight to Archive.. These filter rules will still apply. Muted emails are not marked as read, so if I have a filter where all my group  emails route to a label (folder), then they are still there unread. You can also search muted conversations in your Archive or unmute one.

Do you read all your email? If you use Gmail, did you know about the MUTE button? How many important vs. non-important email do you get everyday?