With so much focus on the design, copywriting and call to action used in email marketing it’s easy to forget how important the subject line is. The seemingly innocuous subject line is more often than not the last thing to be considered in an email marketing campaign, but it’s essentially the deciding factor behind an email getting opened or deleted. It doesn’t matter how professional and effective the email is - if the subject line isn’t up to the job then the whole campaign is at risk of failing.
Think about your own daily inbox experience and the hordes of emails that you routinely delete without a second glance. If a subject line isn’t immediately attention-grabbing, and it’s an unexpected email, then the chances are that you won’t bother opening it. With so many other legitimate emails requiring so much attention, who can blame you?
So there’s really a lot riding on the subject line, therefore it’s vital to give it the same attention and planning that you give to the other elements of an email marketing campaign.
There are two main issues to consider when writing a subject line - firstly, how to avoid junk mail filters and secondly, enticing recipients enough to actually open your message and read it.
1) Junk mail filters, whether as part of email software packages or wider company security policies, use a number of triggers - one of which is the humble subject line. They’re principally on the lookout for any words that clearly identify an email as spam - you know the usual suspects - but often rope in entirely legitimate messages accidentally. Have a look at your own junk mail folder, amongst the viagra and fake Rolex spam there will be at least one innocent email that has been swept up indiscriminately. Look at the subject line of the unlucky email and you’re likely to find the reason why it’s in amongst the junk.
To avoid this fate befalling your next email marketing campaign, steer clear of using certain characters in your subject lines - £-signs, $-signs, exclamation marks and question marks can all inadvertently flag up an email as junk, despite having good reasons for being used.
As well as individual characters, there’s a whole host of words that you should avoid using in your subject lines - “free”, “buy”, “deal”, “best” and “greatest” being some of the most common. In fact, most superlatives provide nothing more than a fast-track to the spam folder. Modern junk mail filters are intelligent and have been created around years of experience detecting spam, so if your subject line sounds anything like it could be a con, then it’s likely to face the chop and never see your recipient’s main inbox.
2) Enticing your recipients to open an email requires some thought. Of course the subject line needs to refer to whatever you’re mailing about, but you need something special to make it stand out above the masses of other emails in an inbox. This really depends on the purpose of your message, the type of customer you’re targeting and what you’re aiming to achieve overall. The demands here vary wildly, but it is essential to think about what the customer will respond and react to.
If you’re sending a regular message to recipients who are expecting the email, then a standard subject line that they’ll become familiar with is a safe bet. If your client has a respected brand name then use it somewhere in the subject line - the trust-factor alone will ensure a good open rate.
An unexpected message, perhaps to a customer database, needs a tempting subject line that is careful not to cross the line into the sensationalist. Again, have a quick scan of your junk mail folder if you want to see sensationalist subject lines.
So in a nutshell, you know your email marketing is wonderful but your recipient doesn’t (yet), and it’s up to the subject line to win them over. It deserves to be more than an after-thought. It’s just as important as any other element of the campaign, and should be treated as such.