It is entirely possible your ISP blocks outgoing traffic from client IP's to port 25 on any IP's other then their own smtp servers. This is to prevent client computers infected with malware from ...

SMTP, or Simple Mail Transfer Protocol, is a set of communication guidelines used by email servers to deliver emails to their clients. Your emails are just strings of text; SMTP helps servers and ...

Hi, I have some e-mail on my Exchange Queue for 3/4 domains that just won't send. It just says "SMTP Protocol Error Occurred". I activated logging in ...

Security researchers have found inconsistencies in how some Simple Mail Transfer Protocol (SMTP) servers handle end-of-data sequences. This allows the injection of SMTP commands into email ...

Deep Sky Technologies has released SMTP Deux 1.0.0 (yep, two zeros there) for Macintosh and Windows. It’s a 4th Dimension component that offers a complete implementation of the SMTP protocol.

Most commercial email servers in the world today support the SMTP protocol, originally defined in RFC (Request for Comments) 821 in August 1982.

Multiple hosted, outbound simple mail transfer protocol (SMTP) servers are vulnerable to email impersonation. This allows authenticated users and certain trusted networks to send emails containing ...

2] Verify SMTP Authentication Settings SMTP protocol plays an important role in sending mail. So, it is necessary to authenticate every user who wants to send emails.

Microsoft announced this week plans to add official support for the DANE and DNSSEC protocols to its cloud-hosted email server offering -- known as Office 365 Exchange Online. DANE and DNSSEC are ...