Is this your secret weapon for increasing deliverability?

In cold outreach, one of the biggest problems is ensuring your messages reach the recipient’s primary inbox.

Even a perfectly crafted email can fall flat if it lands in spam. This is where inbox rotation comes in - a powerful yet often overlooked strategy for boosting email deliverability and maintaining sender reputation.

In this newsletter, we’ll dive deep into what inbox rotation is, why it’s critical for successful email campaigns, and how to implement it effectively.

What is inbox rotation?

Inbox rotation, also known as email rotation, is the process of using multiple email inboxes to send out your email campaigns. Instead of relying on a single inbox, this strategy distributes email sending across multiple accounts to:

• Reduce the risk of triggering spam filters.

• Improve deliverability by spreading out email volume.

• Avoid provider-imposed sending limits.

Think of it as diversifying your assets: you’re spreading the load across several “baskets” to minimize risk and maximize impact.

In simple terms, inbox rotation works by alternating between multiple email accounts when sending messages.

Instead of funneling all emails through one inbox, this technique distributes the workload to multiple accounts. Here’s how it generally functions:

• Multiple accounts in use: You set up several inboxes, each linked to the same domain or different domains, depending on your approach.

• Scheduled rotation: As you send out emails, each inbox takes turns, meaning no single account is overloaded with too many sends.

• Volume distribution: By dividing emails across inboxes, you decrease the risk of hitting spam filters and maintain better deliverability.

How to implement inbox rotation:

Step 1: Set up multiple inboxes

• Create several email accounts under your domain (e.g., [name1]@yourcompany.com, [name2]@yourcompany.com).

• Authenticate each inbox with SPF, DKIM, and DMARC records. These email authentication protocols prove your legitimacy to email providers and protect your domain from spoofing.

• Use a tool like Mailforge or Infraforge to automatically create & set up mailboxes to ensure everything is in tip-top shape!

Step 2: Warm up each inbox

• Gradually increase the number of emails sent from each account over 4–8 weeks.

• Use email warm-up tools like Warmforge to simulate engagement, such as replies and opens, to build credibility with email service providers.

Step 3: Automate rotation with tools

• Use email outreach platforms that support inbox rotation, such as Salesforge. These tools automatically distribute your campaigns across multiple accounts and manage sending schedules.

Step 4: Monitor performance

• Track individual inbox metrics, including:

  • Reply rates

  • Spam complaints

  • Bounce rates

• Analyze performance to identify any inbox that may require attention.

Tips to get the most out of inbox rotation:

🔊Balance email volume across inboxes

• Distribute the workload evenly to avoid overloading any single inbox.

• Rotate emails in small batches to mimic natural email-sending patterns.

🎨 Personalize emails

• Even when scaling, maintain personalization in your outreach to improve engagement. Avoid looking like a mass email campaign.

✅ Stay consistent with branding

• Ensure all inboxes use the same signature, logo, and sender tone. Recipients should feel they’re interacting with a unified brand, even if the emails come from different inboxes.

🧹 Keep your email lists clean

• Regularly clean your email lists to remove invalid addresses and reduce bounce rates, which can harm your sender reputation.

⏸️ Pause underperforming inboxes

• If an inbox starts showing a high bounce or spam rate, pause it, troubleshoot the issue, and warm it up again before reactivating.