/^mailgwgb\d+\.rightnowtech\.com$/
/^mx-\d+\.reddit\.com$/
/^mta-aws\d+\.sanomacorp\.net$/
/^mail.*\.mandrillapp\.com$/
/^mail\d+\.ikea.com$/
/^webgrid.\d+\.emsecure.net$/
/^mail.*.linkedin.com$/
/^mx\d+\.epsonconnect.com$/
/^webgrid.\d+\.emsecure.net$/