How to Warm Up Email Accounts with a Specific Email Provider (ESP)

MailOptimal allows you to control which email providers your warm-up emails interact with. Using ESP-specific warmup, you can choose to warm up your email accounts with Gmail, Microsoft, or other SMTP-based providers—depending on where you want to improve inbox placement.

This feature helps you align your warm-up activity with your actual outreach audience and improve deliverability for the providers that matter most to you.

What Is ESP-Specific Warmup?

ESP-specific warmup lets you select which email providers should receive and interact with your warm-up emails.

Instead of warming up across a mixed pool of providers, you can focus on:

• Gmail

• Microsoft (Outlook / Hotmail / Office 365)

• Other SMTP-based providers

MailOptimal then prioritizes warm-up interactions within the selected provider(s), making the warm-up process more targeted and realistic.

When Should You Use ESP-Specific Warmup?

This setting is especially useful if:

• Most of your prospects use Gmail or Google Workspace

• You primarily send emails to Microsoft / Outlook users

• You’re seeing deliverability issues with a specific ESP

• You want to recover inbox placement for one provider without affecting others

How to Enable ESP-Specific Warmup

Follow these steps to configure the setting:

1. Log in to your MailOptimal account

2. Navigate to Email Accounts

3. Click on the email account you want to configure

4. Go to the Settings tab

5. Open Warmup Settings

6. Locate Email Provider Selection for Warmup

7. Choose one of the following:

   • Gmail

   • Microsoft

   • Others (SMTP)

8. Save your settings

Once saved, MailOptimal will adjust the warm-up activity accordingly.

How This Affects Warmup Behavior

When ESP-specific warmup is enabled:

• Warm-up emails are sent to and interacted with mailboxes belonging to the selected ESP

• Engagement signals (opens, replies, thread continuation) are optimized for that provider

• The system continuously balances activity to keep the warm-up natural and safe

This improves how your sending behavior is perceived by the selected email provider’s spam filters.

Best Practices

• Match your warm-up ESP selection with your primary outreach audience

• Use this setting alongside:

  • Custom warmup mode (Build / Recover / Maintain)

  • Custom warmup templates

  • Inbox placement tests

• Avoid switching ESP selection too frequently—allow time for signals to stabilize

Important Notes

• ESP-specific warmup does not limit who you can send campaigns to—it only controls warm-up interactions

• You can change this setting anytime, but results improve when the configuration remains consistent

• This setting works seamlessly with MailOptimal’s AI-powered warmup engine

Summary

ESP-specific warmup gives you more control over your email deliverability by letting you focus warm-up activity on Gmail, Microsoft, or other providers. It’s designed to help you build trust exactly where you need it—without guesswork.