Warmup filters help prevent warmup emails from appearing in your master inbox.
To set them up, go to the Master Inbox page from the top navigation bar of your Maildoso dashboard. On that page, click Set Up Warmup Filters near the bottom. Then select your sending tool and enter the appropriate warmup tag.
If your tool is not listed, choose Custom and manually add the relevant tag.
Please note, this works only for @maildoso.email Master inbox ONLY for SMTP.