sadly, it's even hard to get some email across when using those ESPs (Email Service Providers). Our domain has all the correct SPF records, DKIM etc and we're

sadly, it's even hard to get some email across when using those ESPs (Email Service Providers). Our domain has all the correct SPF records, DKIM etc and we're using a reputable email provider (Mandrill). All is sparking clean. Validated etc. Still we see some activation emails to google get delivered, but severely delayed on the Google side (after we see an OK from google for the email being delivered). Our users can't reset their password or activate their account until a certain time passes... Emails from my mum (who I've emailed on the same account for nearly a decade) suddenly get flagged as spam by gmail. Go figure.