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kSendText failing: status: 503 5.0.0 Need RCPT

Keywords: 	   kSendText failing: status: 503 5.0.0 Need RCPT

Question:

I am using the wwpst34i extender to send email alerts. The following error is being returned by 'kStatusInfo()':
"Could not send: error= -1 Status: 503 5.0.0 Need RCPT (recipient)". 
However, the email IS successfully sent to the recipient (me): 'tlux@us.ibm.com' even though it says there was an error. I dont know why the error is being returned? Can you help?

I even tried a different SMTP server, and got a similar error:

"Could not send: error= -1 Status: 503 RCPT first (#5.5.1)". 
I have tried everything I can think of... any suggestions?

Resolution:

I figured out the problem! I pulled out the code and put it in a simple script and it worked, which lead me to find that the recipient list had a comma on the end of it so the SMTP server was complaining that it needed another recipient or something...?

Another User Comments:

I have seen this error message when connecting to certain SMTP servers that are unable to do a reverse DNS lookup (PTR record) for your mail server's IP address . It is pretty common these days for SPAM filters.
Article ID:   W15066
File Created: 2017:07:28:13:58:35
Last Updated: 2002:09:05:13:49:24