special character in Marketo subject line

[Anonymous]

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

[Anonymous]

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.

[Grégoire_Miche2]

Hi Emily,

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

-Greg

[Anonymous]

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)

[Grégoire_Miche2]

Hi Emily,

This si great. Looking forward the blog post

-Greg

[Jim_Thao7]

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.