For the life of me I couldn’t figure out why I was having such a bitch of a time getting my email clients to use my new domain SMTP server for my out going mail. No matter how hard I tried I couldn’t get it to work – kept getting error telling me that it couldn’t connect to the SMTP server.
Needless to say I was getting more than a little pissed; but not as pissed as when I found out the reason.
Apparently my ISP here in Canada – BellNet – along with a growing number of ISP’s in North American are locking down Port 25 so that you have to go through their SMTP servers rather than one of your choosing.
The reason being given is that this way they can better monitor traffic for spammer activity. What they don’t say of course is that they can monitor your outbound traffic as well; and we all know what can be done with a good packet sniffer don’t we.
So in the spirit of information freedom here is a current listing on ISP known to lockdown Port 25:
ISP’s that Block Port 25
AOL: SMTP.mail.aol.com
Adelphia: mail.adelphia.net
Ameritech: mailhost.det.ameritech.net
Astound Broadband: smtp.ca.astound.net
AT&T: mailhost.att.net
AT&T Global: smtp1.attglobal.net
Bell internet highspeed (Canadian): smtp10.bellnet.ca
Bell south: mail.bellsouth.net
bigpond.com (Australian): contact service provider for Settings.
Bresnan Communications: mail.bresnan.com
CableOne: mail.cableone.net
Charter Communications: smtp.chartermi.net
Charter.net: smtp.charter.net
CharterTN.net: mail.chartertn.net
CharterMI.net: mail.chartermi.net
Cinncinnati Bell/Fuse Dial-up: smtp.fuse.net
coax.net: smtp.west.coax.net /east / central
comcast: smtp.comcast.net
Cox: smtp.west.cox.net – smtp.central.cox.net – smtp.east.cox.net
Earthlink: smtp.earthlink.net
Etisalat (UAE): smtp.emirates.net.ae
epix: out.epix.net
erols: smtp.erols.com
Frontiernet.net: smtp.frontiernet.net
fuse: smtp.fuse.net
Icehouse.net: mail.icehouse.net
iquest.net: mail.iquest.net
ISP.com: mail.isp.com
Juno: smtp.juno.com
Megared (Mexico): contact service provider for Settings.
Mindspring: smtp.mindspring.com
MSN: smtp.email.msn.com
MSN.DSL: secure.smtp.email.msn.com
NEBI.com: mail.nebi.com
Netcom: smtp.ix.netcom.com
NetZero: smtp.netzero.net
OOL (Optimum Online): mail.optonline.net
Optusnet: mail.optusnet.com.au
Pacific Bell (Pacbell): mail.pacbell.net
panix.com: mailhost.panix.com
PeoplePC: smtp.peoplepc.com
Plala: plala.or.jp
Quixnet.net: smtp.quixnet.net
RCN: smtp.rcn.com
Road Runner(NYC): smtp-server.nyc.rr.com (for other states, and regions contact your Road Runner Support team)
Rogers Hi-Speed (Canadian): smtp.broadband.rogers.com
SBC: smtp.sbcglobal.net
SBC Yahoo: smtp.sbcglobal.yahoo.com
speakeasy: mail.speakeasy.net
sympatico: smtp1.sympatico.ca
The-Beach.net: mail.the-beach.net
Verio: smtp.veriomail.com
Verizon: outgoing.verizon.net
Verizon(alt): smtpout.verizon.net
Videotron: relais.videotron.ca yourlink.ca (Canadian): contact service provider for Settings.
Puget Sound Network, Inc. : contact service provider for Settings: http://psni.com
