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Resolved SMTP TimeOut

  1. How-to
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  1. Julian I.
    Julian I.
  2. PowerBuilder
  3. Monday, 30 October 2023 15:19 PM UTC

Hi,

We are using the PBNISMTP object (pbnismtp.pbx) to send emails using SMTP. We are experiencing delays and sometimes timeout issues when sending emails. The server provider has detected a problem in its infrastructure and is trying to fix it. In the meantime, we believe that the server connection timeout is set to 60 seconds and the question is: do you know if it is possible to reduce the timeout in the pbnismtp object?

Greetings,


Julian.

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Responses (3)
Julian I.
Julian I. Accepted Answer Pending Moderation
  1. Tuesday, 31 October 2023 09:39 AM UTC
  2. PowerBuilder
  3. # 1

Hi,

Thanks !, my knowledge of c++ is very basic but the change seems easy. I am going to investigate how to create a new function to set the timeout and how to rebuild the pbx.

Regards.

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Andreas Mykonios
  1. Andreas Mykonios
  2. Tuesday, 31 October 2023 10:10 AM UTC
By the way, I saw that you are using PB 2019, but you didn't mention the exact release. R2 introduced .NET DLL Importer. When we had to send mails, we developed a simple class in C#, implementing all our requirements. We then used the produced dll to be able to send mail via smtp. C# code may be easier to maintain, and is easier to read compared to C++.

Andreas.
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Andreas Mykonios
Andreas Mykonios Accepted Answer Pending Moderation
  1. Tuesday, 31 October 2023 07:12 AM UTC
  2. PowerBuilder
  3. # 2

Hi.

From what I saw, in PJNSMTP.cpp there is the following code:

#pragma warning(suppress: 26455)
CPJNSMTPConnection::CPJNSMTPConnection() : m_ConnectionType{ConnectionType::PlainText},
                                           m_bConnected{false},
                                           m_bDoEHLO{true},
                                           m_dwTimeout{60000},
                                           m_nLastCommandResponseCode{0},
                                           m_SSLProtocol{SSLProtocol::OSDefault},
                                           m_bCanDoDSN{false},
                                           m_bCanDoSTARTTLS{false},
                                           m_bCanDoSMTPUTF8{false},
                                           m_bDoInitialClientResponse{false},
                                           m_bUsePunyCode{true}

I don't believe that timeout setting is exposed. Currently it is hardcoded to 60 seconds as you correctly concluded. So I guess you would need to change it directly to c++ and recompile the project, or somehow expose that option to powerbuilder.

Andreas.

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John Fauss
John Fauss Accepted Answer Pending Moderation
  1. Monday, 30 October 2023 16:19 PM UTC
  2. PowerBuilder
  3. # 3

Hi, Julian -

According to SMTPClient object documentation, there is a Timeout property for a Send call:

    https://docs.appeon.com/pb2022r2/objects_and_controls/SMTPClient_object.html#d0e63605

Best regards, John

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John Fauss
  1. John Fauss
  2. Monday, 30 October 2023 18:04 PM UTC
Thanks, Chris - I obviously missed that important point. More caffeine, stat!
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Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Monday, 30 October 2023 18:36 PM UTC
Don't worry John ... I suffer from low caffeine quite often - LoL!
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Julian I.
  1. Julian I.
  2. Monday, 30 October 2023 20:02 PM UTC
Thank's to all !, Yes, we are using the latest version of the object from Roland Smith's in "TopWiz" site. Our PB Version is 2019, so we don´t have new features of pb SMTPClient object. We are pending to migrate new pb versión.
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