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Socket Error # 10053 Software caused connection abort

(overview of excerpts from articles in conversation)

Newsgroup: embarcadero.public.delphi.internet.winsock

# Lines
wrote on 16-Jul-2010:

After running flawlessly for 3 to 4 years, my application (Delphi 5,
Indy 9.0.18) began to send "Socket Error # 10053 Software caused
connection abort". This is an applet on 30 clients (WXP pro SP2/SP3)
reading a table to format a message using TIdSMT and TIdMessage
components. Every 4 mins, the table is browsed for new records and, if
67
  
Francisco Alvarado replied on 16-Jul-2010:

On 7/15/2010 10:36 PM, Francisco Alvarado wrote:
  (snip)
One detail: All the clients are using same Sender like
  MailMessage.From.Address := '✉somedomain.com';
  Best regards
  Francisco Alvarado
11
  
Remy Lebeau (TeamB) replied on 16-Jul-2010:

"Francisco Alvarado" <✉brainsoftware.net> wrote in
  message news:✉forums.embarcadero.com...
  (snip)

What did you change on the system recently? APIs do not just spontaneously
  stop working after years for no reason.
  BTW, the last Indy 9 version was 9.0.50.
23
    
Francisco Alvarado replied on 16-Jul-2010:

On 7/16/2010 11:49 AM, Remy Lebeau (TeamB) wrote:
    (snip)
Maybe some changes in Mail Server configuration, which I can't know and
    using the same sender address for all the clients. We are changing this
    right now.
    And you're right: APIs do not just spontaneously stop working after
42
  
Remy Lebeau (TeamB) replied on 16-Jul-2010:

"Francisco Alvarado" <✉brainsoftware.net> wrote in
  message news:✉forums.embarcadero.com...
  (snip)

You are encountering an OS error, not an Indy error.
  --
  Remy Lebeau (TeamB)
17
  
Francisco Alvarado replied on 19-Jul-2010:

On 7/16/2010 1:06 PM, Francisco Alvarado wrote:
  ....
  (snip)

Problem Solved!
  It was not a fault in Indy o in my application. it seems a spam
  filter/Exchange Server/Mail Server was rejecting the message(s) thinking
43
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