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Balu K
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Email Notification issues
Question
Reactive
Application Type
Reactive
Service Studio Version
11.55.29 (Build 64246)

Error sending Email syntax error cannot decode response... i have tried to send an OTP message to the Email but i'm facing such issue in the service center.


Screenshot 2025-07-14 133704.png
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14 Jul 2025
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2019-11-11 17-10-24
Manish Jawla
 
MVP

Hi @Balu K ,

  • Have tested your email functionality in the past or this is the first time you are trying to send email?
  • Have you check system entity provided in this url for email ststaus? https://success.outsystems.com/documentation/11/reference/outsystems_apis/emails_api/ 
  • have you check all the parameters? recipient email, email subject, body everything is in place, you are not missing anything? have you debugged this logic in your app?
  • have you checked the details of this error message? have you found something there?

https://success.outsystems.com/documentation/11/building_apps/sending_emails_from_apps/sending_emails/ 

Regards,

Manish Jawla

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14 Jul 2025
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Balu K

Hi @Manish Jawla I have done this email otp verification I another environment and it's working properly... So there is no mistakes in logic... It's only not working in my personal environment... And this is the first time 

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14 Jul 2025
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2019-11-11 17-10-24
Manish Jawla
 
MVP

Hi @Balu K ,

Another environment is also personal environment? or enterprise? 

Regards,

Manish Jawla

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14 Jul 2025
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Balu K

It's personal only... 

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14 Jul 2025
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2019-11-11 17-10-24
Manish Jawla
 
MVP

 Replying to Balu K's comment on 14 Jul 2025 09:06:00

HI @Balu K ,

Are you using gmail account for send email functionality or external smpt provider?

Can you check you limit regard sending email, or do you link this new application for new personal environment for sending email? because if it's working fine for previous personal environment that means code is fine, it's only configuration or limit which we might causing the issue.

Is there way you can check the email service provider log?

Regards,

Manish Jawla

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14 Jul 2025
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2026-03-12 06-20-48
KUNDAN CHAUHAN
Champion

Hey @Balu K ,

It seems, The email doesn’t have a valid “To” address.

That’s why you're getting: RCPT TO: <> And then: 555 5.5.2 Syntax error, cannot decode response

Check the "To" address in your logic:

  • Open the logic (Server Action) where Send Email is used.

  • Ensure that To, Cc, and Bcc fields have valid, non-empty email addresses.

  • Example:

    Email.To = GetUserById.List.Current.User.Email
    Or 
    Email.To = "someone@example.com"

    Add a Null Check / Validation Before Sending:

    Use a condition like:
    If(IsNullOrEmpty(GetUserById.List.Current.User.Email), Skip Send, Proceed)

    Hope it help you.
    Thanks

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14 Jul 2025
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