Before the first send
Squidlor came with five lists of chains and protocols, 473 addresses in all. Introwire read them as one board and dropped what would have cost the domain:
- 125 role inboxes, such as support@ and security@: read by nobody who can say yes.
- 14 duplicates across the five lists.
- 7 dead domains with no mail server, which would have bounced on the first try.
That left 307 leads.
The send
Ten emails went out from Squidlor's own mailbox between 20:18 and 20:40 IST, one to four minutes apart, in plain text with no tracking pixel. None bounced. A new mailbox starts at ten a day and adds three a day, and nothing can push it past thirty.
What the rules did next
On a later day, an imported list bounced past 2%, and the mailbox paused itself, as it is built to. Nothing more went out until the list was cleaned. That run is why every workspace on Introwire now shares a list of addresses known to bounce, and why a queue can be checked against each company's mail server before it sends. A burned domain is not a growth strategy.
Check your own sending domain, free, before your first day.