Should I send email marketing from the same domain in Kit and GoHighLevel?

Hi! In practice, the “danger” of using the same domain in Kit and GoHighLevel isn’t that inboxes automatically punish you for having two ESPs—it’s that you end up sharing (and mixing) sender reputation across two systems, which makes deliverability harder to control and troubleshoot. If you want the safest, most predictable inbox placement, best practice is either: (1) keep marketing sends in one platform, or (2) use a dedicated sending subdomain for the second platform so any issues don’t spill over to your primary program.

If Kit is already your primary ESP and it’s working well, the cleanest option is usually:

• Keep marketing/newsletter sending in Kit, and sync leads from GoHighLevel → Kit for sequences/broadcasts.

If you do need GoHighLevel to send (common for CRM-style automation, pipeline follow-ups, appointment workflows, etc.), then I’d strongly lean toward:

• Set up a separate sending subdomain for GoHighLevel (example: mail.yourdomain.com or ghl.yourdomain.com) and authenticate it separately (SPF/DKIM, and DMARC coverage).

Why the subdomain approach tends to win for deliverability

• Reputation isolation: If GoHighLevel automation generates more complaints, bounces, or “looks spammy” engagement, that reputation damage is more contained and less likely to drag down your core Kit marketing.
• Easier diagnosis: If open rates drop or you see spam-folder placement, you’ll know which sending stream caused it.
• Different mail types behave differently: High-volume newsletters vs. automated funnel follow-ups often get very different engagement signals, and separating them helps.

When sharing one domain across two ESPs can be “fine”
It can work if both platforms are sending only to high-consent, highly engaged recipients and your list hygiene is strong. Technically, you can authenticate one domain in multiple systems by publishing the right DNS records. The main gotchas are:

• SPF complexity: You must have one SPF record total, and it needs to include all senders without breaking SPF’s lookup limits (this is a common accidental deliverability issue).
• Reputation coupling: A problem in either platform can affect the whole domain’s perception.

A practical setup that’s common and safe

• Brand/marketing: Keep Kit on your main domain (or its own subdomain if you prefer), where your newsletter and key campaigns live.
• Automation/CRM: Put GoHighLevel on a dedicated subdomain, warm it up gradually, and keep a close eye on bounces/unsubscribes/spam complaints.
• DMARC: Keep DMARC on your main domain (you already have it), and make sure your subdomain sending is covered appropriately as well. (Exact DNS details vary a bit by provider, so follow each platform’s authentication instructions carefully.)

If you tell me roughly what you plan to send from GoHighLevel (newsletters vs. 1:1-style follow-ups vs. appointment reminders) and your approximate volume, I can suggest the cleanest split (and whether you should separate “transactional” vs “marketing” streams too).