Emoji usage requires careful consideration:

1. Impact on Deliverability:

• Moderate emoji use typically won't harm deliverability

• Excessive use can trigger spam filters

• Some email clients may display emojis differently
  
  

2. Best Practices:

• Use emojis sparingly and appropriately

• Consider your audience and brand voice

• Test subject lines with and without emojis

• Monitor engagement metrics when using emojis