E-mail numbers per broadcast, in one of two ways.

With broadcast_ids (up to 100, from list_broadcasts): every listed live broadcast of the site in the order given, zeros without e-mails; repeated ids count once, unknown, deleted and foreign ids are left out. The period is optional here: without from and to the numbers cover the whole life, and period is null. This is how to get the numbers of a page of the list in one call.

Without broadcast_ids the period is required: up to 100 live broadcasts by send, most first, including those with activity but no sending in the period. For the rest pass broadcast_ids. Deleted broadcasts and e-mails without a broadcast are left out, so the sum may be below get_broadcasts_stats.

status, search, created_since, started_since, started_before and folder_id narrow either way to the broadcasts that match every one given, and then every matched broadcast is listed, zero ones too: one call gives the numbers of a folder, of the running broadcasts or of the broadcasts sent in a month. total is the sum of the listed broadcasts; use it rather than adding the items up.

Each number counts the events dated in the period on its own, so the numbers are independent: a bounce or an open of an e-mail sent before the period counts here too.

Every number counts e-mails, one e-mail being one message to one recipient, and each e-mail at most once per metric: send e-mails sent, including those rejected on sending; bounce e-mails that bounced or were rejected on sending; deliver is send minus bounce, never below zero; open e-mails opened; click e-mails with at least one link clicked; unsubscribe e-mails whose recipient unsubscribed through them; complaint e-mails reported as spam through the recipient's mail provider. rates next to each total gives the delivery, open, click, click-to-open, unsubscribe, complaint and bounce rates, rounded to 4 places; a rate is null when its denominator is 0, as it is undefined, not zero.