outlook365

Hey guys, I've experienced something strange since Gmail went down earlier last week I think (or this week?). When sending marketing mails through my regular SMTP host & mail sender software, I get a mail delivery failure, with this error code: 550 High probability of spam. Just to clarify...

Need an Email Verifier to to extract a specified emails hosted by e.g Secureserver ,Outlook 365, Zimbra from email bulk list