# Campaign Limits Explained: Domains, Accounts & Volume Understand how SalesTarget controls domain limits, email account capacity, and sending volume to protect deliverability and sender reputation. Published on Apr 6, 2026 · 5 min read Campaign limits in SalesTarget.ai exist to protect deliverability, prevent spam issues, and keep email sending safe and predictable. ## Why Campaign Limits Exist Email providers closely monitor sending behavior. Sending too fast or from too few accounts can damage sender reputation. SalesTarget.ai applies limits to: - Keep sending patterns natural and human-like - Protect inbox placement - Prevent sudden volume spikes - Reduce bounces and spam flags Limits are not restrictions — they are safety controls that help you get better results over time. ## Domain Limits A domain is the part after the @ in your email address — for example, `yourdomain.com`. How domains work in campaigns: - Campaigns send emails from email accounts connected to a domain - One domain can have multiple email accounts - Each domain has its own reputation with email providers Domain limits in SalesTarget.ai: - One domain can have up to 5 email accounts - You can connect or purchase multiple domains - Campaign volume is spread across domains to reduce risk Sending too many emails from one domain can lower inbox placement, increase spam complaints, and cause domain-level blocks. Using multiple domains helps isolate risk and scale safely. ## Email Account Limits An email account is a single inbox — for example, `name@yourdomain.com`. How email accounts work in campaigns: - Campaigns send emails through connected email accounts - Each account has its own daily sending capacity - Accounts can be rotated across campaigns Recommended sending volume per account: Around 30 emails per day per account (recommended). Sending gradually helps maintain a healthy sender reputation. Sending too many emails from one inbox can trigger spam filters, increase bounce rates, and cause temporary or permanent blocks. ## Campaign Sending Volume Campaign volume is calculated using the number of active email accounts, sending limits per account, and the campaign schedule and gaps between emails. Example calculation: - 1 domain - 5 email accounts - ~30 emails per account per day Safe daily send: ~150 emails per day across that campaign To increase volume safely, add more email accounts and more domains — not higher per-account volume. ## How Volume Is Handled Automatically SalesTarget.ai automatically: - Distributes emails across connected accounts - Respects daily sending limits per account - Applies gaps between emails - Stops follow-ups when a lead replies You do not need to manually calculate or manage sending limits. The system handles it. ## What Happens If You Exceed Limits? If daily limits are reached: - Emails are queued — not dropped - Sending continues gradually as capacity opens - Deliverability protection remains active This prevents sudden volume spikes and keeps sending safe and predictable. ## Best Practices - Start with low volume and increase gradually as your sender reputation builds - Use multiple email accounts per domain (up to 5) - Avoid sending high volume from a single inbox - Separate campaigns by domain if you are scaling outreach - Monitor bounces and replies regularly to catch deliverability issues early ## Quick Summary - **Domains** — control reputation at a higher level; up to 5 accounts per domain - **Email accounts** — control daily sending capacity; ~30 emails/day recommended per account - **Campaign volume** — total safe output across all accounts in the campaign - Limits exist to protect deliverability, not slow you down ## Final Takeaway If you want to scale campaigns safely: increase accounts and domains — not per-account volume. Campaign limits are the framework that lets you grow outreach while keeping inboxes healthy and replies coming. ## Scale Outreach Without Burning Inboxes SalesTarget.ai manages sending limits automatically — so you get volume and deliverability, not one or the other.