Mailboxes, daily limits, and warm-up
How sending is paced to protect your sender reputation: per-mailbox caps, the warm-up ramp, sending windows, and rotation.
Updated July 15, 2026
Connecting a mailbox
Every email HeyLinks sends goes out from a mailbox you connect, using your own email address. You connect one by signing in with Google, the same way you would sign into any app with your Google account. Nothing is sent from a shared address or a HeyLinks-owned domain: when a blog owner gets your email, it comes from you.
You can connect more than one mailbox. If you do, HeyLinks spreads your outreach across them, which we cover below.
Per-mailbox daily caps
Each connected mailbox has a daily cap: a maximum number of outreach emails it will send in a day. The cap exists because mailbox providers (like Google) quietly track how each mailbox behaves. A mailbox that suddenly blasts out a large volume of similar emails looks like a spammer, and once a provider decides you look like a spammer, your emails start landing in spam folders. That standing with the providers is called your sender reputation, and it is much easier to protect than to repair.
The warm-up ramp
A newly connected mailbox does not get its full daily cap on day one. It starts with a smaller cap that rises gradually over time. This is called warm-up: the mailbox eases into sending so its volume grows the way a real person's would, instead of jumping from zero to full speed overnight.
A brand-new mailbox starts with a low cap that grows as the mailbox builds a track record.
Starting slow can feel frustrating when you have a batch of approved emails ready to go, but it is the single best thing you can do for a new mailbox. The ramp is automatic; you do not need to configure anything.
Sending windows
Emails go out during sending windows in your timezone, so your outreach arrives at natural hours instead of the middle of the night. An email that lands at 3am both looks automated and gets buried under everything that arrives before the recipient wakes up.
Rotating across mailboxes
If you have connected more than one mailbox, HeyLinks rotates sending across them. Spreading the same total volume over several mailboxes keeps each one's daily count low, which is gentler on every mailbox's reputation and raises how much you can send in a day overall.
What happens at the cap
Hitting a mailbox's daily cap never loses an email. Anything still waiting to send simply stays queued and goes out after the cap resets. You do not need to re-approve anything or press send again; the queue drains on its own.
Say you approve a big batch of emails for retroarcadefinder.com and your mailbox reaches its cap partway through. The rest wait in line and send after the reset, inside your normal sending window. Nothing is dropped.
Bounces, opt-outs, and unsubscribe
A bounce is an email that could not be delivered, usually because the address no longer exists. HeyLinks detects bounces and marks the prospect, so you are not left following up with an address that will never answer. Repeatedly emailing dead addresses also hurts sender reputation, so catching bounces quickly protects your mailbox too.
If someone asks not to be contacted, that is honored automatically. And every email HeyLinks sends carries a proper unsubscribe path, so recipients always have a clean way to opt out instead of reaching for the spam button.