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Regular Visitor

SMTP connector having problems

I have been using the SMTP connector to relay through my Amazon SES account. It has been working great for the past two weeks and in the past hour, I am seeing.


Http request failed with status code 'ReceiveFailure' and status message: 'The underlying connection was closed: An unexpected error occurred on a receive.'.


I even tried to create a new Flow SMTP connector and when adding the connector, I get a connection error. 


Anyone else having issues with their SMTP connector?

Regular Visitor

It started working again. I have a hunch that since I am still on a Free Flow account, there might be some type of quota I hit because I will sending about 50 emails in withing an hour or so.


Does anyone know if there are SMTP connector limitations as part of the free flow account?

Community Support
Community Support

Hi @ EV,


The problem that you encountered maybe a temporary error.


There is no any SMTP connector limitations as part of the free flow account.

However, there is a flow runs limitation between Flow Free , Flow for Office 365 and Flow for Dynamics 365, Flow Plan 1,and Flow Plan 2, the Maximum number of runs per month of Flow Free is 750, the Maximum number of runs per month of Flow for Office 365 and Flow for Dynamics 365 is 2000.


If your flow would run 50 times to send the emails within an hour, you could refer to link below to learn more about the limitations in flow pricing:



Alice Zhang

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