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  • IIS SMTP Virtual Server issue

    Aug 07, 2020 08:34 AM|Mohamed95800|LINK

    Good afternoon,

    I need some help.

    I created a SMTP Virtual server for relay emails send by multiples machines in our infrastructure to Gmail SMTP.

    Our domain = global.corp.

    Email domain = company.fr ( fake , of course ).

    So all emails with a sender "@company.fr" can be relay to the Gmail SMTP by this SMTP internal server , and we receives emails in our mailbox.

    My issue appears when the sender is another domain , for example emails sent by our Cisco server "@cisco.global.corp " ( domaine names are not reals but it's just an example ).

    Gmail rejected emails by this domain , even if we changed the security for allow them on Admin Google portal.

    We can change the domain smtp name in the Cisco server but they will have a lot of issues.

    Maybe someone already have this issue and know how to resolve it easily.

    Best regards,