Can you send cold email from your main domain?
It is possible, but it is almost always a bad idea. Here is why, and on what conditions you can still do it.
This is the opposite of a newsletter tool, where using the main domain is the norm. In cold email, you compartmentalize.
⚠︎ The risk is asymmetric
If your domain's deliverability degrades because of outreach, it is not only your campaign that goes down: it is your quotes, your invoices, your customer conversations. You are gambling your company's communications to save the price of a domain name.
If you do it anyway
- Stay at very low volume, under 30 emails a day.
- Watch your bounce rate every week, and stop everything above 5%.
- Never use a critical address such as billing@ or contact@.