How to Bulk Connect Email Accounts Using CSV in MailOptimal

MailOptimal allows you to connect multiple email accounts at once using the Bulk Connect Email Accounts feature. Instead of adding email accounts one by one, you can upload a CSV file containing your email credentials and settings, and let MailOptimal handle the rest.

This feature is ideal for agencies and teams managing multiple inboxes at scale.

Where to Find Bulk Connect Email Accounts

1. Log in to your MailOptimal account

2. Go to the Email Accounts tab

3. Click the Bulk Connect Emails button

4. A popup will appear where you can upload your CSV file

Supported Email Providers

You can bulk connect:

• Google / Gmail / Google Workspace

• Other SMTP-based email providers

⚠️ Microsoft / Outlook email accounts are not supported via bulk connect
Microsoft accounts require an SSO-based authentication flow and must be connected individually.

Download the Sample CSV Template

Before uploading your data, download the sample CSV template provided in the bulk connect popup.

• The template includes all required columns

• Headers must remain exactly the same

• You can reuse the template for future imports

👉 Use this template to enter your actual email account details and settings.

CSV File Requirements

• File format: CSV or Excel

• Maximum file size: 10 MB

• Maximum accounts per upload: 100 email accounts

• For larger batches, split accounts into multiple files

Required Information in the CSV

The CSV template includes fields for:

• Email address

• SMTP credentials

• IMAP credentials

• Email provider (Google / Other SMTP)

• Warmup and sending preferences

Make sure all credentials are correct to avoid connection failures.

How to Upload and Import Email Accounts

1. Click Bulk Connect Emails

2. Upload your completed CSV file (drag & drop or click to upload)

3. The system will automatically map matching fields

4. Review the field mappings

5. Click Import Email Accounts

Once submitted, the import runs in the background.

What Happens After Import?

• MailOptimal processes the file asynchronously

• You don’t need to stay on the page

• Within 5–30 minutes, you’ll receive an email summary with:

  • Number of successfully connected email accounts

  • Number of failed connections

  • Failure reasons for each failed account

This allows you to quickly fix issues and re-import only the failed rows if needed.

Common Reasons for Failed Connections

• Incorrect SMTP or IMAP credentials

• Unsupported email provider

• Network or provider-level authentication issues

• Invalid email format

The failure reason in the email report will help you identify and resolve the issue.

Best Practices

• Double-check credentials before uploading

• Keep column headers unchanged

• Import in batches of 100 or fewer accounts

• Use Google or SMTP-based providers for bulk imports

• Warm up newly connected accounts before running campaigns

Summary

Bulk Connect Email Accounts helps you:

• Save time when onboarding multiple inboxes

• Import up to 100 email accounts at once

• Automatically apply settings via CSV

• Receive a detailed import report by email

It’s the fastest way to scale your email setup in MailOptimal.