sending
4 posts
deliverabilitysending8 min read
An open source cold email and warmup platform: what self-hosting actually gives you
Warmbly is Apache 2.0 cold email plus warmup you can self-host. What running it yourself means for IPs, workers, and your data, and when cloud is the better call.
sendingdeliverability7 min read
How many cold emails can you actually send per day?
The safe number is per mailbox, not per account: 50/day default, 100 hard max, a 600s gap between sends. Here is the math to plan any daily volume.
sendingdeliverability8 min read
How many mailboxes and domains do you need for the volume you want?
Planning cold email volume comes down to per-mailbox budgets. Work backward from your daily target to the mailboxes, domains, and IP spread you actually need.
sendingdeliverability3 min read
Your send limit is a mailbox budget, not a server setting
People keep asking us to raise their daily limit. The honest answer is that the limit they are asking about does not exist.
Nothing matches that search.
Try a different word, or clear the field.
Start sending cold email that lands.
Connect a mailbox and start warming it today. Free to start, free to self-host.