Best practice tells us not to use symbols in our subject lines – often to the detriment of clarity of our messages. However, Dr Flint McLaughlin (email guru) shares a study where symbols are used and whilst deliverability is reduced, the clarity of message dwarfs the significance.

Deliverability is the biggest challenge for email communications – it doesn’t matter how much time or effort has gone into the creative, the copywriting or the targeting.  If the email cannot be ‘received’ then the effort is wasted.
The volume of spam is driving the ISPs to block emails.  Currently 80% of email traffic is spam, [...]