1 I don't know about you, but when I get an email on my phone and have to squint my eyes to try and make out the words, I hit delete.
2 13) Special offers (27%), vouchers (21%), and real-time tracking (21%) are most preferred email types to receive on mobile.
3 The emails I'm deleting aren't spammy, unpersonalized messages -- they're just poorly optimized for mobile.