I’m always interested in finding out the best times to deploy email campaigns, but through much trial and error, I find that the earlier the better and the more value – the more meaningful the better.
Here is some recent research about how frequently and where people open their email.
Internet users in the US check their personal e-mail throughout the day,
including at work according to eMarketer. Nearly 25% of Internet users surveyed in June 2008 for an AOL-sponsored survey by Beta Research Corporation said
they were most likely to check their email upon waking. But more than 33%
said they checked throughout the day, and the rest of respondents said they
checked at various times, including throughout the night.
More than seven out of 10 employed respondents also said they checked their
personal e-mail at work—and nearly one-third said they did so more than three
times a day.
Nearly 70% of respondents said they had multiple e-mail accounts.