Sending 100,000 emails on day one from a new Amazon SES IP is one of the fastest ways to destroy your sender reputation. Mailbox providers like Gmail, Outlook, and Yahoo track IP sending history. A new IP with no history that suddenly sends at high volume looks like a spam operation - and gets treated like one.
The warm-up process builds that history gradually. In 2026, Amazon SES offers both a managed warm-up option (handled by AWS) and a manual ramp for standard dedicated IPs (AWS, Amazon SES dedicated IP options, retrieved 2026-06-07). This guide covers both approaches plus the warm-up strategy for new sending domains.
Key Takeaways
- Shared IP pools don't require manual warm-up - AWS manages reputation for shared pools automatically.
- Standard dedicated IPs ($24.95/month) require a 6–8 week manual warm-up ramp.
- Managed dedicated IPs ($15/month + usage) warm up automatically under AWS control.
- Always start warm-up sends with your most engaged subscribers - recent openers and clickers build positive reputation signals fastest.
For the bigger deliverability picture beyond warm-up, see our SES deliverability guide.
Do You Need to Warm Up at All?
It depends on which IP type you're using.
Shared IP pools (the default): No warm-up required. Shared pools have established sending history across many customers. SES routes your traffic through pools matched to your volume and category. If you're starting on shared IPs, you can begin sending at your full planned volume immediately - though you should still ramp carefully if you're sending to a large cold list.
Standard dedicated IPs ($24.95/month): Manual warm-up required. You own the reputation of this IP entirely. Starting at full volume from a fresh IP will result in high spam folder placement and possible IP blacklisting.
Managed dedicated IPs ($15/month account fee): Automatic warm-up handled by AWS. This is the main benefit of the managed tier - AWS controls the ramp and protects your IP reputation during the early period.
For most teams starting out, shared IPs are the right choice. Move to dedicated IPs when you're sending 50,000+ emails per day and want full reputation isolation - see our SES dedicated IP guide.
8-Week Warm-Up Schedule for Standard Dedicated IPs
The ramp below suits a sender targeting 100,000+ emails/month as the eventual steady-state volume. Adjust proportionally for higher or lower targets.
| Week | Daily Max Volume | Target Segment |
|---|---|---|
| 1 | 200–500 | Most recently engaged (last 30 days) |
| 2 | 1,000–2,000 | Engaged last 60 days |
| 3 | 5,000–8,000 | Engaged last 90 days |
| 4 | 15,000–20,000 | Engaged last 6 months |
| 5 | 30,000–40,000 | Engaged last 12 months |
| 6 | 50,000–70,000 | Full active list |
| 7 | 80,000–100,000 | Full list + any re-engagement |
| 8+ | Full target volume | Maintain consistent cadence |
Critical rules during warm-up:
Never skip a week. Jumping from Week 2 volumes to Week 5 volumes undermines the gradual ramp mailbox providers need to observe.
Send consistently. Daily or near-daily sending is better than large weekly batches during warm-up. Consistency signals reliable, expected sending behavior.
Monitor daily. Check bounce rates and complaint rates after every send. If complaint rate approaches the 0.1% recommended ceiling, pause and diagnose before continuing.
Prioritize engagement. Start each week with the most recently engaged segment. Positive engagement signals (opens, clicks) build reputation faster than neutral delivery.
Domain Warm-Up: Different from IP Warm-Up
Even if you're on shared IPs, a new sending domain has no reputation with mailbox providers. Domain warm-up follows similar principles to IP warm-up - start small, build gradually, prioritize engaged recipients.
If you're sending from a new domain (or a subdomain you've never sent from before), follow the same ramp schedule above, applied to your domain reputation rather than IP reputation.
Signs your domain warm-up is going well:
Inbox placement rates (visible in VDM or via inbox testing tools) above 90%
Open rates at or above your historical averages
Complaint rates comfortably under 0.1% (AWS's recommended ceiling)
Signs of trouble:
Inbox placement dropping below 80%
Open rates significantly below historical benchmarks (indicating spam folder placement)
Complaint rates pushing against the 0.1% recommended ceiling
If you see trouble signs during warm-up, slow down. Drop back two weeks in the ramp schedule, identify the cause (list quality? content? send frequency?), fix it, then resume.
Using Amazon SES Managed Warm-Up
Managed dedicated IPs ($15/month account fee + usage pricing) include automatic warm-up handled by AWS. When you add a new managed dedicated IP, AWS starts routing a small percentage of your sends through it and gradually increases the percentage as the IP builds reputation.
You don't need to do anything - the ramp happens automatically in the background. AWS's warm-up algorithm is based on observed sending patterns and mailbox provider feedback, making it more adaptive than a fixed schedule.
The trade-off: you have less control over the exact ramp timeline. If you need a new IP operational at full volume by a specific date, managed warm-up doesn't give you that predictability. Standard dedicated IPs + a manual schedule give you more control, at the cost of more management overhead (AWS, Amazon SES Pricing - dedicated IP options, retrieved 2026-06-07).
What to Monitor During Warm-Up
Check these metrics daily during the warm-up period:
In the SES console:
Bounce rate (keep below 2%)
Complaint rate (stay well under the 0.1% AWS-recommended ceiling)
Sending quota utilization
Via Virtual Deliverability Manager (if enabled):
Inbox placement rate by mailbox provider (Gmail, Outlook, Yahoo)
Blocklist status for your sending IP and domain
Via your marketing frontend (Mailblast, etc.):
Open rate (proxy for inbox placement - if open rate drops, emails may be hitting spam)
Click rate
Unsubscribe rate
A sudden drop in open rate during warm-up is often the first sign that mailbox providers have started filtering your messages to spam. Treat it as an early warning and investigate before your complaint rate catches up. For the suppression pipeline that keeps bounces and complaints in check during the ramp, see Amazon SES bounce and complaint handling and the help-doc Improving Email Deliverability.
Frequently Asked Questions
How long does Amazon SES IP warm-up take?
For standard dedicated IPs, plan 6–8 weeks to reach full sending volume safely. Managed dedicated IPs warm up faster under AWS control, typically 3–4 weeks. Shared IP pools require no warm-up period.
Can I speed up Amazon SES warm-up?
You can accelerate warm-up by sending more frequently during the ramp (daily vs. weekly), maintaining excellent engagement rates, and keeping complaint and bounce rates very low. However, there's a practical floor - mailbox providers observe your IP over multiple days to establish a pattern. Rushing the ramp increases the risk of spam filtering.
Does Amazon SES warm up automatically?
Shared IP pools don't require warm-up. Managed dedicated IPs warm up automatically under AWS control. Standard dedicated IPs ($24.95/month) require a manual ramp - AWS doesn't automate this for standard dedicated IP users.
What happens if I don't warm up my Amazon SES IP?
Sending at full volume from a cold dedicated IP will likely result in high spam folder placement (20–50%+ of messages) at Gmail, Outlook, and Yahoo. Some ISPs may temporarily block your IP entirely. Once your IP reputation is damaged, recovery requires weeks of low-volume, high-engagement sending before placement improves.