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Dynamics 365 Community / Forums / Microsoft Dynamics 365 | Integration, Dataverse... / SMTP email sending err...
Microsoft Dynamics 365 | Integration, Dataverse...
Suggested Answer

SMTP email sending error when sending free text invoices in batch (Mailgun)

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Posted on by MA-22050924-0 11
Hi,
 
We are experiencing an issue when we send free text invoices in batch (around 300-400 in one go) and some of the emails fail to send with the below error:
 
/>>> Sending email message has failed (host: smtp.mailgun.org; port: 587; trusted connection: True). The SMTP server has unexpectedly disconnected.”
 
Does anyone know how to solve this? Could it be because of sending limits per minute? 
 
Thanks
I have the same question (0)
  • Suggested answer
    Anthony Blake Profile Picture
    Anthony Blake 3,061 Super User 2026 Season 1 on at
    This will be throttling/sending limits limits controlled by your provider (Mailgun?).
  • Suggested answer
    Mohamed Amine Mahmoudi Profile Picture
    Mohamed Amine Mahmoudi 26,779 Super User 2026 Season 1 on at
    Hi,
     
    I think there are a limitation of Email.
    Try to contact the support of Mailgun
     
    Best regards,
    Mohamed Amine MAHMOUDI

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