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Essentially all residential IPs are blacklisted for email servers, at least on port 25. Many ISPs blackhole any traffic on port 25 to residential IPs. Do you

by tacon 4y ago

Essentially all residential IPs are blacklisted for email servers, at least on port 25. Many ISPs blackhole any traffic on port 25 to residential IPs. Do you have port 25 working on your residential connection?

NavinF 4y ago
Isn’t port 25 used for unencrypted traffic as opposed to port 465? I’m pretty sure I had a working mail server back in 2012 behind an ISP that blocked port 25.
toun 4y ago
It's blocked by default but my ISP lets me open it. But as noted by NavinF I'm not using it anyway.