SPF records
Information about the permissible posts of mail for the domainv=spf1 include:mxsmtp.sendpulse.com +a +mx include:mxsspf.sendpulse.com include:_spf.host.webasyst.com a mx include:_spf.yandex.net include:spf.unisender.com include:spf.unisender.ru ~all