Should You Capitalize Your Email Subject Line?

I’ve never heard any discussion of this subject, or seen any test results, but I suspect that whether an email subject line is upper and lower case may have an influence on results.

Think about it: for most personal emails, lower case is the convention. Commercial emails tend to be upper and lower case, making them look more like a headline. It’s like announcing, “This is an ad.”

It wouldn’t surprise me if an initial cap on only the first word of the subject line would outpull the more common upper and lower case treatment. Anyone care to test and share results?

4 Comments

  1. Posted November 16, 2010 at 6:47 am | Permalink

    I am about to send out this week’s email and this question popped into my head. Only advery emails capitalise subject headers so should I use all lower case as if it were a personal one? I searched google for any research and found your page. Great minds…

    My gut feeling is to use lower case.

    • Posted November 18, 2010 at 12:17 pm | Permalink

      Hi David

      I don’t have hard data to back up the theory, but it’s consistent with other direct marketing principles that have been proven by testing. Let me know if you come across any test results that bear out the theory!

      Val

  2. Posted May 2, 2013 at 2:47 pm | Permalink

    Howdy! Quick question that’s totally off topic. Do you know how to make your site mobile friendly? My web site looks weird when browsing from my iphone. I’m trying to
    find a template or plugin that might be able to resolve this problem.
    If you have any suggestions, please share. Appreciate it!


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