Does Apollo have email warmup?
Yes, and the confusion is understandable. A number of articles online, including an earlier version of this page, said Apollo removed its native warmup in 2024 and left users with only a volume ramp. That is not what Apollo documents today. Its knowledge base article Use Email Warmup to Improve Deliverability, updated 29 July 2026, describes an opt-in Email Warmup feature, powered by Warmbox, that you switch on per mailbox.
What Apollo's warmup includes
Apollo's own description is short, so this section is too. The table above is the whole of what the article commits to, and it is worth reading the figures for what they mean in practice.
- 10 to 40 emails a day, capped at 50. Apollo sets the range and the ceiling. If you set the slider higher, 50 is where it stops. For one mailbox on a domain with some history, that is a workable maintenance level. For a brand-new domain or a set of ten mailboxes that all need reputation fast, it is the constraint you will feel first.
- Reply rate up to 30%, at most 45%. The share of warmup emails that get a reply from the pool. Replies are the strongest of the ordinary engagement signals, so a higher rate is better for reputation up to the point where every message getting a reply looks unlike real correspondence.
- A progressive ramp of two weeks or more. Volume starts at the bottom of the range and climbs. Apollo does not publish the day-by-day schedule, and it does not tell you when a mailbox is ready for sequences, so you judge readiness yourself.
- Credits. Warmup is not free inside the plan. Apollo's article says the feature consumes credits, which matters when you are deciding whether to warm one mailbox or forty.
What Apollo's warmup does not cover
This is the part that decides whether Apollo's warmup is enough for you. Apollo's article is silent on four things a dedicated warming tool is judged on. Silent does not mean absent, but if a feature mattered to Apollo it would be in the article that explains the feature.
- Spam rescue. When a warmup email lands in a pool inbox's spam folder, does anything move it out and mark it not spam? That correction is the signal that repairs a damaged domain, and Apollo does not describe one.
- Mark-as-important and clicks. Beyond opens and replies, Apollo lists no other engagement.
- Sending hours. Nothing about when warmup mail goes out. Mail that leaves a mailbox at 3am in the owner's timezone is a pattern filters can see.
- How the content is written. Apollo does not say whether warmup emails are templated or generated. Google and Microsoft read the content, so templated warmup filler is itself something they can learn to recognize.
There is also the structural point. Apollo's pool is Warmbox's pool: whoever else warms through Warmbox is who your mailbox exchanges mail with, and you do not choose them. That is true of every shared warmup pool, not a criticism specific to Apollo.
How to turn on warmup in Apollo
Email Warmup is opt-in per mailbox. Apollo's article walks through enabling it and setting the daily volume and reply rate; follow that article rather than a screenshot here, because Apollo moves settings around. Three things to decide before you switch it on:
- 1
Start low on a new mailbox
Apollo's range starts at 10 a day for a reason. A mailbox with no history that jumps straight to 40 warmup emails plus real sequences is doing more in its first week than a real person would.
- 2
Count warmup volume against your provider's limits
Google Workspace allows 2,000 messages a day per user and Microsoft 365 throttles at 30 messages a minute with a tenant-wide external recipient cap, so the hard limits are far away. The reputation ceiling is much lower: keep warmup plus real sends on a new mailbox to a total a real person would plausibly send.
- 3
Decide whether Apollo's warmup is your whole warming plan
If it is, keep it running after the ramp, because reputation is built on recent behavior and slides when engagement stops. If it is not, see the next section.
Warm up vs ramp up in Apollo
People search for “Apollo warm up vs ramp up” because the two get conflated. They are different jobs. Warmup is engagement: the emails your mailbox exchanges with the pool so that Google and Microsoft record opens and replies against your domain. Ramping up is a volume schedule for your real sending: starting a new mailbox at a handful of sequence emails a day and raising it as placement holds. Warmup builds the reputation; the ramp keeps your real volume inside what that reputation can carry. A mailbox that ramps its sequences without warming lands in spam on day one. A mailbox that warms and then jumps to full sequence volume throws away the ramp.
Running MailStrike alongside Apollo
MailStrike and Apollo sit at different layers, which is why there is nothing to integrate. Apollo sends your sequences from a mailbox. MailStrike warms that same mailbox. Both connect to the Google Workspace or Microsoft 365 account independently over OAuth, and neither sees the other. There is no Apollo API connector in MailStrike and none is needed.
- 1
Connect the mailboxes Apollo sends from
One-click OAuth for Google Workspace and Microsoft 365, or SMTP and IMAP with an app password. SPF, DKIM, DMARC and MX are checked on connection, with the exact record to publish if one is missing. Each mailbox gets its own AI persona.
- 2
Set the daily warming volume and leave Apollo's sequences running
You set the volume per mailbox and the ramp speed; the defaults reach full volume in 21 days. Warming mail is exchanged only with the MailStrike network, never with your prospects, and it is labelled and archived on arrival so your Apollo-connected inbox stays clean.
- 3
Read Flashman, then scale the sequences
Flashman, MailStrike's AI assistant, writes a daily summary for every connected mailbox with a recommended send volume. Raise Apollo's daily sequence limits as the recommendation rises, and run a placement test before a large send to see inbox, promotions or spam per provider.
Should Apollo's warmup stay on?
You can run both. If you do, the warmup volume adds up: Apollo's 10 to 40 a day plus MailStrike's daily setting is the total the mailbox exchanges, so keep the sum where a real person's correspondence would sit. Most teams that add MailStrike turn Apollo's warmup off once the MailStrike ramp is under way, for two reasons: one warming plan is easier to reason about than two, and the engagement MailStrike produces (an AI persona per mailbox with its own reply rate, dwell time and active hours, threads written by the LLM from your company description, spam rescue and mark-as-important) is the part Apollo's article does not describe. Apollo keeps doing what it is for: finding the prospects and sending the sequences.
How to check where Apollo's emails land
Apollo reports opens and replies, not the folder a message landed in, and open tracking is itself unreliable now that mail clients prefetch images. The only way to know placement is to test it: send to inboxes whose folder you can read. MailStrike's Free Deliverability Test scores your email for spam signals and then reports inbox, promotions or spam per provider, and every warming plan includes placement tests you can run before a big Apollo send. If a test shows Google in spam and Microsoft in the inbox, you have a reputation problem at Google, not a copy problem, and the causes are identifiable.
The short version
Apollo warms, within limits: 10 to 40 warmup emails a day, capped at 50, ramped over two weeks or more, replies at up to 30%, paid for in credits, per its knowledge base of July 2026. Its article does not mention spam rescue, mark-as-important, sending hours or how the content is written. For an easy case that may be enough. For a new domain, a recovery or a large mailbox set, MailStrike warms the same mailboxes with an AI persona each and runs alongside Apollo's sending, with no integration to configure and nothing to change in your sequences.
Questions people ask about Apollo.io warmup
Does Apollo have email warmup?
Yes. Apollo's knowledge base, updated 29 July 2026, documents an opt-in feature called Email Warmup, powered by Warmbox. Once you switch it on for a mailbox, Apollo exchanges 10 to 40 warmup emails a day with other warmup inboxes, capped at 50, and ramps up progressively over two weeks or more. Articles that say Apollo removed warmup in 2024 are out of date.
What is Apollo email warmup, exactly?
A warmup pool run by Warmbox and surfaced inside Apollo. Your mailbox sends warmup emails to other inboxes in the pool, which open them and reply at a rate Apollo puts at up to 30%, at most 45%. The volume starts low and climbs over the first weeks. The point is to give the mailbox a record of engagement before your sequences start going out from it.
Is Apollo email warmup free?
It is part of the Apollo plan, but Apollo's article says the feature consumes credits. Check your plan's credit allowance before switching it on across a large mailbox set.
How long does Apollo warmup take?
Apollo documents a progressive ramp of two weeks or more to reach the top of its 10 to 40 a day range. It does not publish a day at which a mailbox is ready for outreach, so treat two weeks as the ramp's length, not as a readiness promise.
What is the difference between Apollo warm up and ramp up?
Warmup is the engagement Apollo generates through the Warmbox pool: emails your mailbox exchanges with other warmup inboxes so it builds a record of opens and replies. Ramping up is the volume schedule any sender should follow when a mailbox is new: starting low and increasing the number of real emails a day. You need both. Warmup builds the reputation; the ramp keeps your real sending inside what the reputation can carry.
Do I still need a dedicated warmup tool if I use Apollo?
It depends on how hard your case is. For a mailbox on an aged domain with a decent history, Apollo's warmup and a sensible ramp may hold placement. For a new domain, a domain recovering from spam, or a large mailbox set, the cap of 50 a day and pool-style engagement are the limits you run into. MailStrike warms the same Workspace or Microsoft 365 mailboxes with an AI persona per mailbox, LLM-written threads and spam rescue, and runs alongside Apollo's sending. You can run both.