Why one inbox is not enough
Email providers such as Google and Microsoft measure sender reputation per inbox and per domain. If you suddenly send many emails from a single address, it looks like spam behaviour — no matter how good the copy is. The result is lower deliverability, more emails in the spam folder, and in the worst case a blocked inbox.
Each inbox also has a practical limit for how much it can send per day without raising suspicion. If you want to reach many prospects, you will hit that limit quickly if you only have one address to send from.
How rotation works
Inbox rotation distributes sends evenly across multiple inboxes, so that each one stays within a safe, low volume. A campaign with several hundred recipients is automatically distributed across all connected inboxes, rather than loading a single one.
An important point: one conversation should be kept in the same inbox. If a prospect replies, both the reply and the follow-up should come from the same sender — it is confusing and undermines trust to be contacted by three different addresses in the same thread. Good rotation distributes new recipients, but keeps existing conversations together.
Warm-up and volume go hand in hand
Rotation does not replace warm-up — the two go hand in hand. New inboxes must be warmed up gradually before being put to proper use, otherwise they get flagged early. Start low, increase volume over weeks, and stay within conservative limits per inbox even after warm-up.
More volume is solved by adding more inboxes, not by pushing more through the existing ones. That is the safe way to scale — and it is precisely how inbox rotation in Vexter is built: you connect more inboxes, and campaigns distribute sends automatically while each conversation is kept in its own thread.
- Warm up each new inbox gradually before running campaigns
- Maintain a low, steady daily volume per inbox
- Scale by adding inboxes, not by increasing volume per inbox
- Keep each individual conversation in the same inbox from start to reply