Unable to send scripted mails through Office 365 SMTP

Recently we received complaints from our programmers saying their codes to send emails via smtp.office365.com were failing due to login failure. We checked and found that the issue is due to the introduction of Security Defaults in Azure security to block legacy authentication methods. As a quick solution, we resorted to turning off the securiy … Read more

Drop SMTP connection at HELO/EHLO matching machine name

Recently there has been many rogue incoming SMTP connections from different IP addresses with the same machine name – “ylmf-pc“. My guess is that these different machines were infected with malware and this malware is utilizing the machine to perform brute force password attack to gain authorization. My server is hosting cPanel and thus using … Read more