Knowledgebase
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Port 25 blocked for mail / SMTP server list
Posted by Dan Moses on 02 September 2005 12:16 PM
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Many ISPs in the US are randomly blocking port 25 without telling their cusotmers. When customers report a problem then they will tell you that port 25 can no longer be used to send mail, as a spam prevention measure. They will allow exceptions if you request so, however. This will require you to fill out an online form which they can provide a link to. A quick workaround to this is to change your mail client to use the SMTP server of your ISP. Find your ISP below and update your SMTP server settings in your mail client from mail.yourdomain.com to use their smtp server instead. Carrier Server Address ------- -------------- Adelphia mail.adelphia.net America Online (AOL) smtp.aol.com Atlantic Broadband smtp.atlanticbb.net AT&T (Broadband) mail.attbi.com AT&T (Dialup) smtp1.attglobal.net AT&T Worldnet mailhost.worldnet.att.net or imailhost.worldnet.att.net BCPL mail.bcpl.net Bellatlantic gtei.bellatlantic.net or smtpout.verizon.net> Bellatlantic.net smtpout.bellatlantic.net Bellsouth mail.bellsouth.net Bestweb smtp.bestweb.net Blazenet smtp.blazenet.net Cable One mail.cableone.net CAIS smtp.cais.net CAPU smtp.capu.net Charm.net smtp.charm.net Charter Communications smtp.charter.net Comcast smtp.comcast.net Compuserve smtp.compuserve.com or smtp.site1.csi.com Concentric.net smtp.concentric.net Covad smtp.covad.net Cox West smtp.west.cox.net(west coast users) Cox Central smtp.central.cox.net (central users) Cox East smtp.east.cox.net(east coast users) Cox Business smarthost.coxmail.com Crosslink smtp.crosslink.net DCANET smtp-relay.dca.net Delmarva Online mail-gw.dmv.com Delta Net smtp.deltanet.com Direcway smtp.direcway.com DSL Extreme smtp.dslextreme.com Earthlink Network mail.earthlink.net or smtp.earthlink.net Earthlink Network (International only) ismtp.earthlink.net Edge.net mail.edge.net Enter smtp.enter.net EROLS mail.erols.com Ezy smtp.ezy.net Flashcom mail.flashcom.net or smtp.flashcom.net Frontline.net smtp.fcc.net Gateway.net smtp.Gateway.net GTI mail.gti.net HotMail mail.hotmail.com IBM.Global net smtp1.ibm.net ioNet Inc mail.ionet.net Interaccess.com smtp.interaccess.com Internet America mail.airmail.net ITOL mail.itol.com Juno smtp.juno.com Mediacom mail.mchsi.com Mediaone.net smtp.ce.medione.net MegaPath mail.megapathdsl.net MCI mailrelay.mciworldcom.net mailrelay.internetmci.com Mindspring smtp.mindspring.com MSN smtp.email.msn.com Nauticom mail.nauticom.net Netcom smtp.ix.netcom.com Netcom (Canada) smtp.netcom.ca Netscape smtp.isp.netscape.com NetZero smtp.netzero.net NYU.edu smtp.nyu.edu OLG.com mail.olg.com OPTOnline Internet Service mail.optonline.net Pacbell mail.pacbell.net Patriot Media smtp.patmedia.net Pipeline smtp.pipeline.com Prodigy smtp.prodigy.net PSI.net relay.smtp.psi.net PTD.net promail.ptd.net port 25 QIS mail.qis.net Qwest Internet Service pop.dnvr.qwest.net RCN smtp.rcn.com Rider.edu enigma.rider.edu RoadRunner smtp-server. SBC Global smtp.sbcglobal.net SBC Global Yahoo smtp.sbcglobal.yahoo.com Smallville Communications mail.toto.net SNiP mail.snip.net Spectrum DSL mail.webstable.com SprintLink smtp.a001.sprintmail.com Sprynet m6.sprynet.com Starpower smtp.starpower.net Sympatico mailhost.sk.sympatico.ca UMBC smtp.gl.umbc.edu USA.NET mail.netaddress.usa.net US Internet smtp.usit.net UUNet mail.uu.net Verizon Internet Services outgoing.verizon.net or smtpout.verizon.net Wide Open West smtp.mail.wideopenwest.com XO Communications mail.njd.xo.com or smtp.concentric.net Yahoo smtp.mail.yahoo.com Ziplink smtp.ziplink.net | |
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