Email Subject Lines That Get Opened: What Really Works in 2025

Our white label copywriting team explores what truly works in email subject lines to ensure your messages land in inboxes and get clicked this year. 

Emojis and Symbols

Emojis and symbols can help you capture attention in cluttered inboxes. Their strategic use goes beyond decoration – a well-placed symbol can enhance message clarity and the overall mood you’re trying to get across.

Length Matters

With most users checking emails on mobile devices, we recommend keeping subject lines short and sweet. Aim for a balance between intrigue and clarity within the 50 or so characters you use. 

We’ve also found that shorter lines drive curiosity, while longer ones can be effective when paired with preview text for deeper storytelling. 

 

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Harnessing Emotion

Emotional triggers are still a good tool to use in 2025. Using techniques like peronsliasaiton will help you to tap into specific feelings like excitement, fear of missing out (FOMO), or anticipation. We’ve also found that subject lines that create a sense of belonging or urgency resonate more effectively. 

Crafting messages that inspire action through emotion-based appeals makes subscribers feel connected and understood, driving higher engagement and conversion rates.

Avoiding Spam Triggers

Despite technological advancements, spam filters remain a major concern. Successful subject lines avoid common spam triggers like excessive capitalisation, special characters, or overused promotional phrases such as “Free” or “Limited Time Offer.” Compliance with updated email marketing regulations helps maintain deliverability. 

Seasonal and Event-Based Subject Lines

Using timely, personalised references to important holidays on your audience’s calendar makes emails feel fresh and relevant. The best way to go about it is to pick holidays that actually mean something to your client base or business to prevent coming off as opportunistic or forced.

If you want to win the battle of email open rates this year, work with our white label copywriting team to develop more effective subject lines.

 

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