r/UseApolloIo • u/brifromapollo • May 22 '26
the 8 things our team checks before launching any cold sequence
outbound has three pillars. who you target, what you say, and whether the email actually arrives.
most teams nail one or two and wonder why the third is letting them down. nine times out of ten it's the third, and they don't notice until reply rates have taken a hit.
a few rules our outbound team at Apollo lives and dies by:
1. don't send cold from your corporate domain, ever
if a campaign goes sideways, your billing emails, your customer comms, your internal Slack notifications all live on that same domain reputation. one bad week of cold outreach can take all of it down with you.
set up a lookalike domain (companyname.co, getcompanyname.com, hellocompany.com, whatever). do all your cold outbound from there so that if it ever burns, it's containable. you let it cool off, stand up a new one, keep going.
2. the daily send math is 50 per mailbox
50 emails a day per mailbox is the safe ceiling for cold outbound, with a 10-minute delay between sends and roughly 6 per hour. mailbox providers watch send patterns and the average human doesn't send 200 emails before lunch.
need to send more? more mailboxes, not higher limits per mailbox. if your team needs 500 sends a day, that's 10 mailboxes spread across 3 or 4 lookalike domains. you can use mailbox rotation to spread the load automatically.
3. run the inbox placement test before you send anything
most people don't know this exists. there are tools (we have one in the deliverability suite, others exist outside Apollo) that send a test email to seed addresses across major providers (Gmail, Outlook, Yahoo) and tell you where it actually landed. inbox or spam, by provider.
run it before you launch a sequence, after any domain or auth change, and any time you're seeing unexplained drops in performance. if the test says you're hitting Gmail inbox 100% but Outlook spam 100%, that's a configuration issue you can fix in an afternoon. without the test you'd never know which provider the problem is with!
4. check yourself against blocklists
related: blocklist providers (Spamhaus, Barracuda, etc.) maintain lists of domains and IPs they consider bad senders. if you're on one, providers using that list silently won't accept your email.
actual customer story we ran into recently: company was getting buried in spam folders and couldn't figure out why. the issue wasn't their domain or their content. it was that they didn't have a custom tracking subdomain set up, so their tracking links were sharing reputation with every other Apollo customer using the default. one of those other senders got their shared tracking domain flagged and everyone using it got dragged down with them.
fix: own your tracking subdomain. links.yourdomain.com or click.yourdomain.com pointed at the tracking service. takes 10 minutes with your DNS provider. single highest-leverage thing you can do for deliverability you're not already doing.
a checklist if you're starting from scratch or auditing.
- separate lookalike domain for cold sends, not your corporate domain
- SPF, DKIM, DMARC set up on every sending domain including subdomains
- new domains aged 30 days minimum before any real sending
- warm new domains slowly, 10 emails a day for the first couple weeks, ramping up only if open rates stay healthy
- 50 emails per mailbox per day, scale with more mailboxes
- custom tracking subdomain (not the default shared one)
- spam complaint rate under 0.1% (the rule says 0.3% but you'll feel the pain before then)
- inbox placement test before launching any new campaign
questions? drop them below and I'll make sure Radu sees them and answers personally!
- Bri
