Email Warmup for B2B Sales Teams
SDRs and AEs depend on cold email delivering to the inbox. One domain deliverability problem doesn't stay isolated — it can affect the reply rates of everyone on the team sending from the same domain.
Most B2B sales teams discover email deliverability the hard way. Sequences go quiet, open rates collapse, and someone in RevOps eventually spots that half the team's outreach is landing in spam. By then, weeks of pipeline are already gone.
Why deliverability matters more for sales teams than most people realise
Consumer email services (Gmail.com, Outlook.com) have individual reputation. Business email — Google Workspace, Microsoft 365 — shares domain-level reputation across every sender on that domain.
When an SDR sends aggressively from a new mailbox on your company domain and it lands in spam, it's not just their sequence that suffers. The domain's reputation score gets pulled down, and every other sender using that same domain can see inbox placement degrade too. That includes AEs following up on demo requests, CSMs sending onboarding emails, and anyone else using the same @yourcompany.com address.
Warmup, at the sales team level, isn't just about one person's deliverability. It's about protecting a shared sending asset.
What's different about warmup for B2B sales teams
Sales teams face a different set of constraints than solo senders or agencies:
- Company mailboxes. You're sending from a real business domain — one that handles sales, support, operations, and leadership mail. A burnt domain here is a much bigger problem than a burnt outreach domain.
- Shared domain risk. Multiple SDRs and AEs sending from the same @company.com domain means each person's sending behaviour affects everyone else's deliverability.
- Sequence tools. Outreach, Salesloft, Apollo, HubSpot Sequences, and similar tools connect directly to company Gmail or Microsoft 365 accounts. Warmup needs to run in parallel without routing conflicts.
- IT and security oversight. Connecting a third-party tool to a company mailbox sometimes requires IT or admin sign-off. Warmerly uses standard Google and Microsoft OAuth — the same method your sequence tool uses.
- No outreach domain. Most sales teams don't have a dedicated sending domain separate from the primary company domain. That means the stakes of a deliverability problem are higher.
The right way to warm mailboxes for a sales team
The principles are the same regardless of team size, but the order of operations matters.
- Warm new mailboxes before connecting them to any sequence tool. A new hire or a newly created sending mailbox needs at minimum 2–3 weeks of warmup activity before it should send any cold outreach. Start warmup the day the mailbox is created.
- Stagger new senders on the same domain. If you onboard three new SDRs in the same week, don't connect all three mailboxes to warmup simultaneously. Ramp them a few days apart so the domain-level sending volume doesn't spike.
- Keep warmup running during active campaigns. Warmup isn't a pre-launch step — it's ongoing maintenance. The warmup traffic runs in the background alongside your sequences and keeps the reputation signal consistent even when outreach volume fluctuates.
- Check authentication before sending anything. SPF, DKIM, and DMARC need to be correctly configured on your domain. A misconfigured DKIM record means some providers will reject or spam-folder your mail regardless of warmup status.
- Monitor placement regularly. Knowing that your mail inboxes on Gmail is not enough if your target accounts use Microsoft 365. Seed tests across both providers catch problems before they show up as dropped reply rates.
How Warmerly fits into a sales team's stack
Warmerly connects to each team member's Gmail or Outlook mailbox via the same OAuth flow they use to connect Outreach, Salesloft, or Apollo. It runs the warmup engine in the background — real peer-to-peer traffic, spam-folder rescue, positive engagement signals — and surfaces the results in a single dashboard your RevOps or sales operations team can monitor.
Because Warmerly is warmup-only, it doesn't touch your sequences, your contact lists, or your CRM data. Your sequence tool and Warmerly use the same Gmail or Microsoft 365 account. There's no routing conflict, no DNS change required, and no interference with existing sending workflows.
Warmerly is priced at £9/month flat — not per mailbox, not per seat. Whether you have 5 SDRs or 25, the cost stays the same. For sales teams onboarding new hires regularly, that predictability matters.
Common warmup mistakes sales teams make
These patterns come up repeatedly when sales teams start paying attention to deliverability.
- Connecting a new SDR's mailbox to sequences before warmup is done. A new hire or new mailbox needs 2–3 weeks of warmup before cold sending starts. Skipping this to hit ramp targets faster is the most common cause of early-tenure deliverability failure.
- Warming all new starters at the same time. If your domain hasn't sent at that volume before, simultaneously adding three or four new senders can look like unusual activity to Gmail and Microsoft. Stagger new mailboxes by a few days each.
- Stopping warmup when a rep goes on leave or between campaign waves. Reputation decays during inactivity. Warmup should run continuously at maintenance volume even when sequences are paused.
- Assuming company-level SPF and DKIM covers everything. Company auth records are sometimes set up for the primary domain but not for sending subdomains. Warmerly flags misconfigurations before they silently reduce deliverability.
- Treating deliverability as IT's problem, not sales ops'. Authentication is IT. Warmup, sending volume, engagement rates, and placement — those live in sales ops territory. Both teams need to be aligned.
- Only reviewing open rates to assess deliverability. Open rates are noisy and affected by Apple Mail Privacy Protection. Inbox placement tests and spam-folder rates give a clearer picture of what's actually happening.
What Warmerly gives your sales team
Every feature below is available on every plan, including the starting tier.
Protect your company domain
Warmup all team mailboxes before cold outreach starts. Consistent reputation signals protect the shared domain that everyone — sales, support, leadership — sends from.
Works with your sequence tool
Warmerly runs in parallel with Outreach, Salesloft, Apollo, HubSpot Sequences, and other tools. No routing changes, no conflicts. Same Gmail or Outlook account, two separate functions.
Flat rate for the whole team
Add every SDR and AE mailbox at no extra cost. Warmerly's flat monthly price covers unlimited mailboxes — so onboarding new hires doesn't increase your warmup costs.
Daily authentication monitoring
SPF, DKIM, DMARC, and MTA-STS are checked every day for every connected mailbox. If your IT team changes DNS records and something breaks, you'll know before it affects outreach.
Multi-provider placement testing
Seed tests run across Gmail, Outlook.com, Microsoft 365, and other providers. If your prospects use Microsoft 365 and your mail is spam-foldering there, you'll see it before it costs you pipeline.
Health history per mailbox
Every reputation change is logged with a timestamp. When a rep's open rate drops unexpectedly, RevOps can pull up the health timeline and see exactly what changed and when.
Check your email health before scaling outreach.
Connect a mailbox in 60 seconds. Warmerly starts monitoring immediately and begins the warmup sequence automatically.
Questions
Can my SDRs use Warmerly with their existing company Google Workspace or Microsoft 365 mailboxes?
Yes. Warmerly connects via standard Google OAuth and Microsoft OAuth — the same authentication methods your sequence tools use. Each team member connects their own mailbox. No admin credentials are shared, and the connection can be revoked at any time from within their Google or Microsoft account settings.
Will Warmerly interfere with our existing sequence tool (Outreach, Salesloft, Apollo)?
No. Warmerly only runs the warmup engine — it doesn't touch your sequences, contact lists, or sending schedules. Your sequence tool and Warmerly both access the same Gmail or Microsoft 365 mailbox independently. There's no routing conflict.
We send from our primary company domain. Is warmup still relevant?
Especially relevant. Company domains are shared by everyone in the organisation. A deliverability problem on a sending SDR's mailbox can drag down inbox placement for other senders on the same domain. Warming new mailboxes before connecting them to sequences is the single most effective step you can take to protect shared domain reputation.
How long does warmup take before an SDR can start cold outreach?
For a new mailbox on an existing, well-established company domain, 2 to 3 weeks of warmup is typically enough before starting cautious cold outreach. For a brand new company domain (under 60 days old), allow 3 to 4 weeks minimum. Starting too early is the most common cause of early-tenure deliverability problems.
How much does Warmerly cost for a sales team?
Warmerly is priced at a flat monthly rate — not per mailbox and not per seat. You can connect every SDR and AE mailbox on your team for the same price as connecting one. Check the pricing page for the current plan details.
What if a rep leaves the company? Can we remove their mailbox?
Yes. Mailboxes can be disconnected from Warmerly at any time from the dashboard. When a rep leaves and their mailbox is closed, disconnect it from Warmerly before or when you deactivate the mailbox. There's no billing impact — your flat monthly rate stays the same.
Warm your sales team's mailboxes before the next campaign.
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