In email warmup, not all inboxes are created equal. Different email service providers (ESPs) use unique spam filters, reputation algorithms, and engagement signals. Warming up your sending mailbox with interactions from the same types of providers your real recipients use builds targeted reputation faster — and dramatically improves inbox placement where it matters most.
That's why E-Warmup gives you full control with the "Select Warmup Providers" feature (also shown as "Warmup with Specific Providers" in some sections).
Most warmup tools send emails across a generic mixed network — but real-world deliverability depends on who engages with your emails:
B2B-focused campaigns (e.g., targeting companies, sales outreach, lead gen) usually land in Google Workspace, Microsoft 365 / Office 365, or similar business-grade inboxes. These ESPs have stricter filters and value professional, consistent engagement.
B2C or mixed campaigns may hit personal inboxes like free Gmail, Outlook.com, Hotmail, Yahoo, or AOL — which prioritize different signals (e.g., consumer-like behavior).
If your real cold emails mostly go to Google Workspace recipients but your warmup only interacts with personal Gmails, your reputation with business providers stays weak — leading to spam folder issues.
Targeted warmup fixes this fast:
Focus warmup on the exact ESPs your audience uses → Build strong, relevant positive signals (opens, replies, conversations).
Fix specific deliverability problems quicker (e.g., if one mailbox struggles only in Google Workspace, target B2B providers to recover reputation there faster).
Avoid wasting warmup activity on irrelevant networks.
Choose the network that best matches your outreach goals:
All Providers — Balanced warmup across the full network (ideal for general or mixed B2B/B2C campaigns).
B2B — Focused on business-grade providers like Google Workspace, Microsoft 365 / Office 365, and similar enterprise inboxes. Perfect for cold email outreach, sales, agencies, and SaaS — where most recipients use professional accounts.
B2C — Targeted at personal/consumer providers like free Gmail (@gmail.com), Outlook.com / Hotmail, Yahoo, AOL, etc. Great if your campaigns target individual consumers or mixed audiences.
Pro Tip: For most cold email users in 2026, B2B is the top recommendation — as Google Workspace and Microsoft 365 dominate B2B inboxes, and warming specifically with them delivers the highest real-world inbox rates.
Connect your mailbox(es) in the E-Warmup dashboard.
Click on your mailbox (es), find "Warm up with" (under Advanced Settings).
Pick All Providers, B2B, or B2C based on your main recipient types.
Start warmup — all future warmup emails will route only to the selected network for authentic, targeted engagement.
Monitor results in your deliverability dashboard (blacklist checks, inbox placement tests, and reputation metrics included in every plan).
You can change this setting anytime if your campaigns evolve — no downtime required.
Scenario | Best Choice | Why It Helps Most |
Cold outreach to businesses/companies | B2B | Builds reputation with Google Workspace & Microsoft 365 — the biggest B2B ESPs |
Struggling with Gmail/Workspace specifically | B2B | Targets the problem ESP directly for faster recovery |
Targeting consumers or mixed lists | B2C | Strengthens signals for free/personal inboxes |
Brand new or unsure of audience | All Providers | Safe, broad warmup to establish baseline reputation |
Combine this with our Mailbox Limit Increase Add-on to warm multiple mailboxes with the same targeted network — perfect for agencies or high-volume senders.
Ready to supercharge your deliverability?
Head to your E-Warmup dashboard to select your warmup providers today — or check our pricing page to see this feature included in every plan (Lite through High Volume).
Target smarter, land in inboxes faster. Your campaigns deserve it! 
Questions? Our support team is ready to guide you.
