Smartlead handles the sending infrastructure so you can focus on copy and targeting. It rotates across unlimited sending accounts, warms new mailboxes automatically, and keeps your primary domain off the firing line.

What we use it for

• Running multi-mailbox campaigns across 20–100+ sending accounts
• Auto-warmup for new domains before going live
• Centralised inbox for managing replies across campaigns
• A/B testing subject lines and openers at volume