IP Pools verifiedimportantWritten by the Hub
Named groups of sending addresses — and the screen that enforces one pool per address.
In detail
A pool is a name and a description; addresses are attached to a pool that already exists. The name appears in logs and results and can be named in a job, which is the indirection that lets a campaign move between addresses without changing the campaign. An address belongs to exactly one pool. Adding it to a second moves it, and the console says so — created, stolen from another pool, or unchanged. Addresses attached to nothing form the default pool. This is a real difference from PowerMTA, where pools overlap freely, and it changes how a warm-up plan has to be expressed: not "this address is in the Gmail pool and the warm-up pool", but one membership at a time.