ISP's That Block Port 25

 

This is a list of known ISP's that block port 25.




AT&T
BellSouth
CableOne
Charter
Comcast ATTBI
Cox
EarthLink
Flashnet
MediaOne
MindSpring
MSN
NetZero
People PC
RNC
Sprynet
Sympatico.ca
Telus
Verio
Verizon

The alternative outbound SMTP port is port 587.




Note: For other alternatives refer to the article: 'My ISP has blocked port 25'.
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