Sending a single email is easy. Sending thousands at once without landing in spam, getting blacklisted or burning your sender reputation is a different game. Here is the playbook.
1. Use a real bulk email platform
Gmail, Outlook and Office 365 cap outbound volume around 500 - 2,000 emails per day. Above that you need a dedicated SMTP / bulk email service with proper deliverability infrastructure.
2. Authenticate your domain
- SPF authorises your sending IPs.
- DKIM signs each message.
- DMARC aligns the two and tells receivers what to do on failure.
3. Warm up new IPs gradually
If you use a dedicated IP, ramp from a few hundred sends per day up to your full volume over 2 - 4 weeks. Cold blasts trigger blocks.
4. Segment and personalise
Send to engaged contacts first. Segment by behaviour, source or tag — you will get higher opens and lower complaints.
5. Throttle, monitor, iterate
Use Mailpro to throttle send rate per ISP and monitor opens, bounces and complaints in real time. Stop the campaign immediately if complaints spike above 0.3%.
Send millions, not maybes
Mailpro handles authentication, IP rotation and throttling automatically. Open a free Mailpro account or discover the bulk email software.
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