Warm-up for
cold email agencies
Stop losing deals to spam folders. Stekpad helps agencies warm up client domains at scale with AI-generated content that is unique to every mailbox. Manage all your clients from a single dashboard, track deliverability per account, and automate the entire warm-up process so you can focus on closing deals instead of debugging email configurations.
The agency deliverability problem
Cold email agencies face unique deliverability challenges that generic warm-up tools were not designed to solve. Here is what keeps agency owners up at night.
New domains get flagged instantly
Every time you onboard a new client, you start from zero. Fresh domains have no sender reputation, and sending cold emails from a brand-new domain is the fastest way to get flagged by Gmail, Outlook, and Yahoo. Without proper warm-up, your client's first campaign could tank their deliverability before it even starts. Most agencies learn this the hard way — after losing a client because their emails went straight to spam.
Client reputation is always at risk
When you manage multiple client accounts, one bad domain can affect your entire operation. Shared IPs mean that if one client's domain gets blacklisted, it can drag down deliverability for everyone. You need per-client monitoring and isolation to prevent cross-contamination, and manual checks simply do not scale when you are managing dozens of accounts simultaneously.
Manual warm-up does not scale
Warming up domains manually — sending emails one by one, monitoring bounces, checking blacklists — might work for one or two domains, but it falls apart at scale. When you are onboarding five new clients a month, each with multiple domains, manual warm-up becomes a full-time job. You need automation that handles the complexity while you focus on strategy and client relationships.
How Stekpad solves it
Purpose-built features for agencies managing multiple client domains and mailboxes.
Every warm-up email is unique, generated by Llama 3.3 70B. This means no two emails in your entire client portfolio share the same content. Spam filters cannot detect patterns across your domains because there are no patterns to detect. Our AI creates realistic business conversations with varied tones, subjects, and writing styles that match each client's industry.
Add and manage dozens of mailboxes from a single dashboard. Group them by client, set per-client warm-up schedules, and monitor health scores across your entire portfolio. You can onboard a new client in minutes — add their mailboxes, configure their warm-up parameters, and let Stekpad handle the rest while you focus on campaign strategy.
Every mailbox gets its own health score based on inbox placement rate, bounce rate, reply rate, DNS health, and blacklist status. You can see at a glance which clients are healthy and which need attention. Aggregate views let you report to clients with clear data showing exactly how their deliverability is improving over time.
Integrate Stekpad directly into your agency's workflow with our RESTful API. Automate mailbox provisioning, pull health scores into your reporting tools, and trigger warm-up schedules programmatically. If you use a CRM or project management tool, you can connect Stekpad to your existing stack and manage everything from one place.
Invite your team members to manage client accounts with role-based access control. Account managers can view reports and add mailboxes, while admins have full control over billing and configuration. Enterprise plans support unlimited team members so your entire agency can collaborate on deliverability.
Generate branded deliverability reports for your clients with your agency's logo and colors. Export PDF reports showing health score trends, inbox placement rates, and DNS status — everything your clients need to see, presented under your brand. This feature is currently in development and will be available soon.
Agencies using Stekpad see 3x better inbox rates in the first 30 days
Our adaptive ramp-up algorithm adjusts volume based on real-time signals from each mailbox. Combined with AI-generated content that is unique to every email, agencies consistently see higher inbox placement rates compared to traditional template-based warm-up tools. The first 30 days are critical for new domains, and Stekpad makes sure you build reputation the right way from day one.
97%
Average inbox rate
14 days
To reach full volume
0.3%
Average bounce rate
“We switched to Stekpad after trying three other warm-up tools. The AI-generated content is a game changer — we no longer worry about our clients' domains sharing the same templates. Our inbox rates went from 60% to over 95% in less than a month. Managing 40+ client mailboxes from one dashboard saves us hours every week.”
Sarah M.
Founder, OutreachScale Agency