How do you set up Apollo.io for lead generation?
Set it up in seven steps, in this order: build and save a search, save the right people to a list, link a mailbox on a sending subdomain, warm it up, set sending limits, create a sending schedule, then build the sequence and its rules. The middle steps also set your start date: Apollo's warmup FAQ says to let warmup finish before sending any automated or manual emails from Apollo, and it recommends at least two weeks of warmup. Every step below comes from Apollo's Knowledge Base, checked 5 November 2026, and is for Apollo's web app in a desktop browser.
Build a people search you can reuse
Click People, then Show Filters > More Filters. Apollo's search guide says filters combine with AND logic, while values inside one filter combine with OR, so every new filter narrows the list and every extra job title widens it. Save the search and set a subscription alert: Apollo can email you new matches daily, weekly or monthly, which turns one search into a standing lead source (saved searches and alerts).
Save only people you would email this month
When you bulk select, use Max people per company so one firm doesn't fill your list. Click Save, choose Emails only, and pick which email statuses to keep (verified, unverified, unavailable or catch-all), then add them to a list and review the credit estimate before you confirm, as Apollo's save guide describes. Keep verified only for a first campaign; our guide to why Apollo lists bounce and how to clean an export explains each status.
Link a mailbox on a separate subdomain
Go to Settings > Outbound > Mailbox > Link mailbox and choose Gmail or Outlook. Apollo's deliverability guide is blunt: "Never send cold emails from your primary domain." It recommends an outreach subdomain with SPF, DKIM and DMARC set up, and a tracking subdomain before you send; without one, it says to turn off open and click tracking. Check your plan first: Apollo's mailbox article allows 1 linked mailbox per user on Basic, and unlimited Google Workspace and Microsoft 365 mailboxes on Professional and Organization.
Warm the mailbox for at least two weeks
In Settings > Outbound > Email setup and health, toggle Start warm up. Apollo's warmup guide recommends Progressive warmup, an end date at least two weeks out, a minimum of 10 and a maximum of 40 warmup emails a day (the cap is 50), and a 30% reply rate (the cap is 45%). Its FAQ says to let warmup finish before sending automated or manual emails from Apollo.
Set the sending limits
Click the mailbox under Settings > Outbound > Mailboxes. Apollo's sending limits page (updated 30 October 2026) says to start at 50 emails a day per mailbox, and lists 50 to 100 a day, 10 to 20 an hour and a 60 to 300 second delay between emails as its recommended ranges. Add an unsubscribe link to your signature at the same time. For US recipients, the FTC's CAN-SPAM guide also requires your valid physical postal address in each message and opt-outs honoured within 10 business days (this isn't legal advice).
Create a weekday sending schedule
Go to Settings > Team email & sequences > Sequences > Schedules > + New Schedule. Apollo's schedule guide recommends ticking Use the contact's local time zone, then adding a time block for each day you want to send. By default Apollo skips seven US holidays, and it counts weekends inside the wait time between steps.
Build the sequence, then add contacts
Click Sequences > Create Sequence > From scratch, name it, pick the schedule, choose a ruleset under Show Advanced Settings (saved rulesets depend on your plan; Custom Rules works without one), then Add a step for each touch. Toggle each step on and click Activate, per Apollo's sequence guide. The sending mailbox is chosen when you add contacts, not in the sequence itself. To test an email, save it as a template, then open it under Emails > Templates and click Send test email to me.
How many cold emails can you send from Apollo a day?
Start at 50 a day per mailbox. Apollo counts every email it sent from that mailbox in the previous 24 hours, so the limit doesn't reset at midnight, and anything over the limit stays scheduled and retries later instead of being dropped. Warmup traffic and mail you send outside Apollo don't count toward the counter. Apollo also says to raise the limit only once you consistently reach at least a 5% reply rate with a strong domain reputation, and to add mailboxes rather than push one mailbox harder.
That 5% bar is higher than the averages in the vendor studies we compared in what a good cold email reply rate is, so expect to stay at 50 for a while unless your replies beat those averages. That makes the mailbox, not the database, the limit on how many new people you can reach. Here is the arithmetic for a sequence with three automatic emails, sending on weekdays only, assuming nobody replies (replies stop the sequence, so real numbers are a little better):
| Setup | Emails a week | New people a week | New people in 4 weeks |
|---|---|---|---|
| 1 mailbox at 50 a day | 50 × 5 = 250 | 250 ÷ 3 ≈ 83 | about 333 |
| 2 mailboxes at 50 a day | 500 | about 167 | about 667 |
| 3 mailboxes at 50 a day | 750 | 250 | 1,000 |
Two plan facts change this table. On Basic, Apollo allows 1 linked mailbox per user, so a one-person team on Basic sits on the first row. And warmup isn't free beyond the first mailbox: Apollo's warmup FAQ says paid plans typically include warmup for 1 mailbox per seat, and each extra linked mailbox uses 200 credits per 30-day billing period. For plan prices and what credits buy, see our Apollo pricing breakdown.
New mailboxes start lower still. When ramp-up is active, Apollo uses the lower of the ramp-up limit and your setting; its own example is a ramp-up limit of 5 a day on a mailbox set to 50, which means 5 until ramp-up rises. Your provider's limits apply on top: Apollo's page lists up to 2,000 a day for Google Workspace, 500 for free Gmail and 5,000 for Office 365, and says providers often apply hidden limits and throttling as well.
What does Apollo do to protect your domain while you send?
Apollo has a set of sending policies under Settings > Outbound > Email setup and health > Sending protection, and three of them matter most for a small team. Apollo's sending protection article (updated 16 October 2026) describes them:
- Bounce guard is on by default. It flags a sequence for review at a 4% bounce rate and pauses sending at 6%, and it only calculates the rate once at least 200 emails have been sent in the past 7 days. On a ramp-up limit like Apollo's own example of 5 a day, a new mailbox on a weekday schedule sends 25 a week (5 × 5), far below 200, so in the first weeks you watch bounces yourself.
- Restrict catch-all domains is also on by default: Apollo blocks high-risk catch-all contacts when you add them to a sequence and warns about lower-risk ones.
- Restrict unverified emails holds back contacts with unverified addresses at enrolment. Apollo checks it when you add contacts, not at send time, and turning it off later doesn't enrol them retroactively.
Two more settings protect you from embarrassing sends. In a sequence ruleset (Settings > Team email & sequences > Sequences > Sequence rulesets), Apollo's ruleset guide lists defaults that finish a contact when they reply or book a meeting and pause them on an out-of-office reply. You can also choose what happens when someone else at the same company replies: do nothing, mark the remaining emails for that account as not sent, or delay them. For a small team writing to two or three people per company, delaying is the sensible choice.
Does Apollo automate LinkedIn outreach?
No. LinkedIn steps in an Apollo sequence are reminders for a person to act. Apollo's LinkedIn task guide says: "Apollo doesn't automatically complete LinkedIn tasks for you." You add a step (Send connection request, View profile, Interact with post or Send message), write the message with variables such as {{first_name}}, and when the task comes due you open Tasks > LinkedIn Tasks, copy the message, click through to the profile and send it yourself.
Two details catch teams out. First, manual tasks block progress: Apollo's sequence guide says your team must complete or skip required tasks before a contact can advance, so a contact sitting at Active but not moving usually has an overdue task. Second, the same LinkedIn guide warns that too many LinkedIn actions done quickly can get your account temporarily restricted, and that too many ignored, pending or spam-marked connection requests put the account at risk. Budget the time: a sequence with two LinkedIn steps for 83 new people a week is about 166 manual tasks a week.
What should your first Apollo sequence look like?
Three automatic emails and two LinkedIn tasks over ten days is enough to learn whether your list and message work. Wait times are minimum calendar delays, so the days below are the earliest each step can go. Swap in your own offer; the copy is a sample for a fictional company, Northwind Ltd, writing to operations leads.
Settings to pair with it: a weekday schedule in the contact's local time zone, a ruleset that delays the account when a colleague replies, and Bounce guard left on. Apollo's schedule guide adds one useful detail: when several emails are due at once within a sequence, it sends to prospects with higher scores first. For how many steps to add later and how far apart, see cold email sequences that get replies.
Which Apollo features fit a small team, and which can wait?
Start with search, lists, one warmed mailbox and one sequence; add the rest once the first campaign has produced replies you can learn from. The deciding facts, from Apollo's help pages checked 5 November 2026:
| Feature | Use it in month one? | Deciding fact |
|---|---|---|
| Saved search alerts | Yes | Daily, weekly or monthly emails of new matches for searches you own |
| Email warmup | Yes, before the first send | Apollo recommends at least two weeks; extra mailboxes use 200 credits per 30 days |
| Extra mailboxes | Only if your plan allows | 1 per user on Basic; unlimited Google Workspace and Microsoft 365 on Professional and Organization |
| Buying intent | Later, if your plan includes it | Apollo says intent is shown by companies, not people, so the people it surfaces may not be involved in the search for a product |
| LinkedIn steps | Only with time set aside | Every LinkedIn step is a manual task someone has to complete or skip |
Apollo is the wrong fit when most of your buyers answer on LinkedIn or X rather than email, or when nobody on the team has hours a week to run searches and clear tasks. If you would rather have an agent find people from buying signals and contact them on LinkedIn, X and email within the daily goals you set, that is what Siela's Lead Finder does. Whichever tool you use, judge the first month by positive replies and meetings held per 100 people contacted; our sibling guide to lead generation KPIs shows how to set those targets.
Frequently asked questions
Is Apollo.io good for lead generation?
It suits teams that sell mainly by email and phone and want a large database to search. Its sequences send email automatically, but LinkedIn steps are manual tasks, and Apollo recommends starting each mailbox at 50 emails a day, so a single mailbox reaches roughly 80 new people a week with a three-email sequence.
Can you send cold email from Apollo for free?
Yes, with limits. Apollo's pricing page says email campaigns are included on every account, but free plans can connect Gmail accounts only. Its warmup guide says warmup is available on select plans, and the warmup FAQ says each mailbox on a free plan uses 200 credits per 30-day billing period. Check your plan in the app before you count on free sending.
Why are my Apollo emails stuck on Scheduled - Delayed?
Usually because the mailbox hit its Apollo limit, which counts the last 24 hours rather than resetting at midnight, or because the email is waiting for the next window in your sequence schedule. If neither applies, Apollo's sending limits page says your mailbox provider may be rate limiting you, and you can hover over the status in Emails to see the reason.
Should I warm up a new mailbox before using Apollo sequences?
Yes. Apollo's warmup guide recommends progressive warmup for at least two weeks, with 10 to 40 warmup emails a day, and its FAQ says to let warmup finish before sending automated or manual emails. Warmup sends system-generated test messages through a third-party network, not your sequence copy.
How many mailboxes can I connect to Apollo?
It depends on the plan. Apollo's mailbox article, checked 5 November 2026, allows 1 mailbox per user on Basic, and unlimited Google Workspace and Microsoft 365 mailboxes on Professional and Organization, plus up to 5 or 15 custom IMAP or SMTP mailboxes per user respectively. Legacy plans may differ.
Sources
- Apollo Knowledge Base: Search for People (updated 28 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Save, Share, and Set Alerts for Searches (updated 14 Aug 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Save Contacts and Accounts (updated 28 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Link Your Mailbox to Apollo (updated 6 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Email Deliverability Best Practices (updated 26 Aug 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Use Email Warmup to Improve Deliverability (updated 6 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Configure Email Sending Limits (updated 30 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Configure a Sequence Sending Schedule (updated 4 Aug 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Create a Sequence (updated 16 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Manage Sequence Rulesets (updated 28 Jul 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Manage Sending Protection in Apollo (updated 16 Oct 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Complete LinkedIn Tasks in a Sequence (updated 29 May 2026) (checked 5 Nov 2026)
- Apollo Knowledge Base: Use Buying Intent to Prioritize Prospects (updated 21 Oct 2026) (checked 5 Nov 2026)
- Apollo.io: Pricing (FAQ) (checked 5 Nov 2026)
- FTC: CAN-SPAM Act: A Compliance Guide for Business (checked 5 Nov 2026)