[V24} Windev error in smtp emailing

Hello All

I have an issue with one client when they email out using smtp in my Windev V24 program.
The same error occurs if they are sending one email or fifty
The error message is:

'EmailSendMessage' function, syntax 3
What happened?
Unable to send message.
Check the recipient addresses as well as your account settings (sender address).
Failure may be caused by a technical problem.
Four successive attempts have been made. Problem Details:
- First attempt:

Failure sending recipients.
The last response of SMTP server is: 
<550 5.7.1 Service unavailable, Client host [193.114.148.186] blocked using Spamhaus. To request removal from this list see [www.spamhaus.org] AS(1440) [ME3AUS01FT016.eop-AUS01.prod.protection.outlook.com]

The Windev software is running on a Windows 16 std server.
I have no reports of problems from other clients so it seems to be just this one client

The smtp server is using domainname-com-au.mail.protection.outlook.com unsecured port 25
The error is being triggered on the EmailSendMessage statement so the process has successfully opened the smtp server with EmailStartSMTPSession


All help greatly appreciated

Regards
Al

It looks like some blacklist problem in the IP 193.114.148.186.
Spamhaus is reporting that the machine wtih this IP is infected with nymaim botnet

Check this link ( [check.spamhaus.org] ) for more details.

Regards

Paulo Oliveira

Hello Paulo

Thank you for your quick response.
I will pass your info on to my client's tech support people.

Regards
Al