Tag: port 25

Having Problems Sending Email Because Your ISP is Blacklisted?

October 9, 2013

It happens over and over — users trying to send legitimate email messages are blocked from sending because the IP address that they are getting from their Internet Service Provider (ISP) for their personal computer (or small office) is on some major blacklist, like SpamHaus. Comcast, for example, has been the focus of many of these […]

How to send unlimited email to someone for free and without authentication or SSL

September 14, 2012

We field questions daily from customers who need to configure some special software or piece of equipment to send them email, but can’t because their SMTP logins require authentication (e.g. a username and password), or their software/hardware cannot be configured to connect to specific SMTP ports, or maybe because their logins require SSL/TLS for transmission security but […]