IP Warm-Up to Improve Email Deliverability
IP warm-up is a best practice for building a solid sending reputation and improving email deliverability.
The process involves gradually increasing the volume of emails sent from a new or rarely used IP address, giving ISPs time to recognize and trust the source.
Why IP Warm-Up Matters
If an ISP detects a sudden spike in email volume from a new or inactive IP, it may flag the traffic as suspicious and apply strict filters or delays.
A proper warm-up helps to:
- Build the IP’s reputation progressively
- Reduce the risk of being blacklisted
- Ensure more reliable delivery, especially to Gmail, Outlook, Yahoo, etc.
How Utixo Manages IP Warm-Up
The Utixo SMTP service includes an automated IP warm-up strategy for every newly provisioned IP.
This process optimizes:
- Initial sending speed
- Delivery quality
- Long-term IP reputation
The warm-up procedure is fully managed by Utixo at the infrastructure level, requiring no action from the user.
Tip
In the first few weeks, we recommend sending emails only to verified and engaged recipients to support the warm-up process and reduce bounce rates.
