special character in Marketo subject line

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Anonymous
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special character in Marketo subject line

Dear all

Urgent question - Does somebody has experience with : , ; - () / & .... in the Subjectline? I guess # are not a good idea to puh due to

spam filter but how about the otheres? thanks for your feedback

5 REPLIES 5
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Level 6

Re: special character in Marketo subject line

IMO, special characters are pretty big red flags for spam filters altogether.

If you really feel like you need special characters in your subject line and want real results, do some A/B testing.

Anonymous
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Re: special character in Marketo subject line

You know I don't have any metrics on this but we often use "," and ":" and "-" in our email subject lines. I will add this to my list of things to investigate in our email metrics.

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Re: special character in Marketo subject line

Hi Emily,

If you do so, then pls post a blog article to let us know

-Greg

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Anonymous
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Re: special character in Marketo subject line

I will be putting together a much longer post on this soon, but preliminary results from our May promotional email analysis indicate not much of a difference in the subject lines:

  • We sent half of our promotional emails in May with characters in the subject line
  • Opens were slightly higher and clicks slightly lower
  • If the subject was a question, the opens were noticeably higher
  • Deliverability was slightly better with characters in the subject (88.9% without vs 90.2% with)
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Re: special character in Marketo subject line

Hi Emily,

This si great. Looking forward the blog post

-Greg