I'm able to send email using tsmtp class just fine, but only from certain systems. The very same code at other instalations with other ISPs I get the error below:
10/05/2006 11:01:15: 554-rmail Microsoft MAIL Service, Version: 6.0.3790.211
554-Your access to this mail system has been rejected due to the sending MTA's poor reputation. Please reference the following URL for more information:
554 http://www.senderbase.org/search?search ... .12.172.21
How can I solve this problem? Any ideas?
Thank you,
Reinaldo