Re: [IMail Forum] ISP's blocking port 25 except to their own mail servers

[Matrosity Tech Support]

Just curious, why not let your clients send email throught their own ISP's? This save you bandwidth, processing, etc... Matt Robertson wrote: A. Clausen wrote: If we start seeing dopes leaving 587 as an open relay, then yes, perhaps someday those dopes will screw it for the rest of us. Thats exactly what I was alluding to. I will say that all of my dsl customers have had zero trouble with 2525. However one lone customer on dialup had it work, but then 24 hours later it was blocked. Not too surprising as to why. If I face something similar it won't take much to switch everyone over to Port 587. The switch to 2525 was surprisingly smooth when the port 25 blocks cascaded down in the last few weeks. But again I wonder if SBC, Comcast et al in their collective wisdom won't block it anyway; treating it as a control issue and forcing use of their own servers.