Is sending 4,000 emails per day safe from a private email server?

[sofialora]

I’m planning to run a small email campaign (around 3,000–4,000 emails per day) for transactional and customer update emails.
Is this volume safe on a private email server if properly warmed up?
What server setup and sending practices should I follow to avoid spam issues?

 

[fabwebstudio]

Yes, 3,000–4,000 emails/day is safe on a private server if it’s warmed up properly.

Key requirements:

Dedicated IP

SPF, DKIM, DMARC, and PTR set correctly

Gradual warm-up (start 200–300/day, increase over 2–3 weeks)

Consistent sending (no spikes)

Best practices:

Separate transactional and bulk emails

Keep bounce rate <2% and complaints near 0

Send only to opted-in users

Monitor blacklists and sender reputation

Follow this, and you should avoid spam issues.

 

[medicinecourierncr]

Yes, sending 3,000–4,000 transactional or customer-update emails per day is safe on a private email server if it is properly set up and warmed up. Use a dedicated IP, configure SPF, DKIM, DMARC, and rDNS correctly, and warm up the IP gradually instead of sending full volume on day one. Maintain consistent daily sending, throttle emails evenly throughout the day, and avoid sudden spikes. Send only to opt-in, clean lists, remove bounces and inactive users, and keep content simple and non-promotional. Regularly monitor bounce rates, spam complaints, and sender reputation to ensure good inbox placement and avoid spam issues.

 

[Reloisback]

If the people you are sending emails to are your own customers, and the emails are not spam, you can use an email system like Brevo.

Otherwise, it should be as fabwebstudio says.
I send 1-2 million emails daily, and they all end up in spam, but that's what my customers want.