https://www.emailmarketingtipps.de/2015/12/10/top-tweets-from-the-email-insider-summit-december-2015/ 2015-12-10T12:45:54+00:00 monthly 0.2 https://www.emailmarketingtipps.de/2015/12/07/hashing-email-lists-adwords-customer-match/ 2015-12-07T22:53:06+00:00 monthly 0.2