Sender health

Kata scores every domain and mailbox from 0 to 100 over the last 30 days, and pauses them when bounces rise.

The scores

Inbox placement comes from the warmup emails in Instantly: every hour Kata reads how many of the last 7 days landed in the inbox and how many in spam. It counts from 10 landed emails. The health ring shows it on hover, and health and list_mailboxes return it.

0% bounces scores 100; 5% or more scores 0. 0% complaints scores 100; 1% or more scores 0. Under 20 sends the score is provisional and starts from careful values. A paused mailbox or domain scores 30 at most; a mailbox paused before it ever sent is just idle.

Tool: health.

Auto-pause on bounces

• Kata counts the hard bounces of each mailbox on its last 200 emails. Soft bounces do not count. Under 3 hard bounces, nothing happens: one bad address says nothing about the mailbox.
• Above 3%, the mailbox slows down: its daily cap is halved (never under 5 a day), at most once a day. The note says why, for example slowed to 5 a day: bounces 3/60.
• Above 10%, over 50 sent emails or more, the mailbox pauses itself. The note says why, for example bounces 6/50.
• A mailbox that sends more than 10% of its warmup emails to spam (20 or more landed, last 7 days) pauses itself. The note says, for example, warmup emails in spam: 4/30 (13%, 7 d).
• When two mailboxes of the same domain are paused, the whole domain pauses.

Kata never turns them back on by itself. Resume with set_domain or set_mailbox once you know why.

What a bounce does

Kata reads the bounce notice and sorts it:

The type, the SMTP code and the reason show on the lead's timeline and in the campaign's results. campaign_report gives hard and soft counts and the top reasons. Spam complaints count as unsubscribes.