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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / The SMTP mail system r...
Small and medium business | Business Central, N...
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The SMTP mail system returned the following error: "The remote certificate is invalid according to the validation procedure

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Posted on by Saurabh1987 5

i  am getting below error

Microsoft Dynamics NAV
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The SMTP mail system returned the following error: "The remote certificate is invalid according to the validation procedure.".
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OK
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i have blocked internet at my Nav server. Only Smtp.gmail.com is allowed .After given the internet access  . issue resolved .Please  help me in resolve the problem i cannot give internet permission

Regards

Saurabh

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  • Suggested answer
    Inge M. Bruvik Profile Picture
    Inge M. Bruvik 1,051 Moderator on at
    RE: The SMTP mail system returned the following error: "The remote certificate is invalid according to the validation procedure

    Seems like you have a network issue and that opening for smtp.gmail.com is not enough.

    Look at your firewall logs and see what traffic is blocked when you try to send e-mail.

  • Suggested answer
    Inge M. Bruvik Profile Picture
    Inge M. Bruvik 1,051 Moderator on at
    RE: The SMTP mail system returned the following error: "The remote certificate is invalid according to the validation procedure

    The outgoing SMTP server, smtp.gmail.com, requires TLS. Use port 465, or port 587 if your client begins with plain text before issuing the STARTTLS command.

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