Technical Best Practices for Email Formatting - Email Format Guide

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1. Email Address Standards

Best Practices for Email Addresses

Use lowercase letters ([email protected])
Avoid special characters except for . - _
Keep addresses under 64 characters
Use professional naming conventions for business emails

Recommended formats:

2. HTML vs. Plain Text Emails

HTML Emails

Advantages:

Rich formatting and styling
Embedded images and links
Better tracking capabilities
Brand consistency

Plain Text Emails

Advantages:

Universal compatibility
Faster loading times
Better deliverability
Preferred for technical communications

Best Practice: Always include a plain text version with HTML emails for better deliverability and accessibility.

3. Email Deliverability Optimization

Key Factors Affecting Deliverability

Proper authentication (SPF, DKIM, DMARC)
Balanced text-to-image ratio
Clean HTML code
Responsive design for mobile devices
Proper use of headers and metadata

Spam Filter Prevention Tips:

Avoid excessive punctuation (!!!, ???)
Don't use all caps in subject lines
Maintain consistent sending volumes
Keep image sizes under 100KB
Use authenticated sending domains

4. Technical Specifications

Maximum recommended email width: 600-800 pixels
Recommended file types for images: JPG, PNG, GIF
Maximum recommended email size: 100KB
Recommended subject line length: 50 characters or less

5. Mobile Optimization

Use responsive design techniques
Minimum font size: 14px for body text
Touch-friendly button size: minimum 44x44 pixels
Single-column layouts for mobile devices