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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / SMTP Error NAV 2016
Small and medium business | Business Central, N...
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SMTP Error NAV 2016

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Posted on by Community member 2
 Hello,
 
The following error is occurring when testing email connection:
 
//
 
The firewall settings are allowed.
 
I understand this could be fixed by a CU update (https://cloudblogs.microsoft.com/dynamics365/no-audience/2018/12/06/how-to-get-earlier-versions-of-the-dynamics-nav-development-environment-to-work-with-tls-1-2/) but this really is not feasible since we are upgrading them anyway to BC in a few weeks.
 
Is there no other setting or configuration that is lacking, which could be causing this error?
 
Thanks,
I have the same question (0)
  • Suggested answer
    YUN ZHU Profile Picture
    YUN ZHU 94,369 Super User 2025 Season 2 on at
    SMTP Error NAV 2016
  • Suggested answer
    Jun Wang Profile Picture
    Jun Wang 8,194 Super User 2025 Season 2 on at
    SMTP Error NAV 2016
    if the smtp was working fine and just broke. check the following
     
    if anyone changes the credentials
    if modern authentication needs to be used instead of basic
    if the TLS is set up correctly
     
    seek someone from someone familiar with the clouds/server side to check/fix the settings. 

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