Cada proveedor de acceso a Internet, generalmente ofrece su propio servidor smtp. En este listado se muestran las configuraciones comunes de algunos servicios de SMTP:
- Adelphia: mail.adelphia.net
- Amaze.net.au: mail.amaze.net.au
- Ameritech DSL: smtp.ameritech.yahoo.com
- Atlantic Broadband: smtp.atlanticbb.net
- AOL: smtp.aol.com
- AT&T: mailhost.att.net
- AT&T Broadband: mail.attbi.com
- AT&T Global Dialup: smtp1.attglobal.net
- AT&T WorldNet: mailhost.worldnet.att.net
- Australink.net: mail.australink.net
- Bellatlantic: smtpout.verizon.net
- Bellatlantic.net: smtpout.bellatlantic.net
- Bell Canada: smtp10.bellnet.ca
- Bellsouth: mail.bellsouth.net
- Bluelight.com: smtp.mail.yahoo.com
- BlueYonder: smtp.blueyonder.co.uk
- Bondinet.com: mail1.oznet.net.au
- Breathe: mailhost.breathemail.net
- Bright.net: mail.bright.net
- Bt Click: mail.btclick.com
- Bt Connect: smtp.btconnect.com
- BT Internet: mail.btinternet.com
- BT Openworld: mail.btopenworld.com
- BusinessServe: smtp.businessserve.co.uk
- Cableinet: smtp.blueyonder.co.uk
- Claranet: relay.clara.net
- Comcast: smtp.comcast.net
- CompuServe: smtp.compuserve.com
- Concentric.net: smtp.concentric.net
- Cox (este): smtp.east.cox.net
- Cox (oeste): smtp.west.cox.net
- CWCom: smtp.ntlworld.com
- DCAnet: postoffice.dca.net
- Demon: post.demon.co.uk
- Earthlink.net: smtp.earthlink.net
- Easynet: smtp.easynet.co.uk
- Ee.net: mail.ee.net
- Freeinet.com: mail.ma.freei.net
- Freeserve/Wanadoo: smtp.freeserve.co.uk
- Freeserve: smtp.freeserve.net
- Free-Online: relay.free-online.co.uk
- Gateway: smtp.gateway.net
- Genie: mail.genie.co.uk
- Greenbank.net.au: mail.greenbank.net.au
- Hotkey.net.au: mail.hotkey.net.au
- ibm.net: smtp1.ibm.net
- IC24: smtp.ic24.net
- Icdc.com: mailout.icdc.com
- INFOLINK.com: mail.nfolink.com
- Interlink: mail.your-net.com
- Inweb Networks: post.inweb.co.uk
- IronNet: mail.iron.net
- IwayNET: smtp.iwaynet.net
- Jade Inc.: mail.jadeinc.com
- Lineone: smtp.lineone.net
- Log on America: mail.loa.com
- Logicworld.com.au: mail.logicworld.com.au
- Lycos: smtp.lycos.co.uk
- Madasafish: smtp.madasafish.com
- MegaNet: smtp.meganet.net
- Microsoft’s MSN: smtp.email.msn.com
- MidOhio.net: mail.midohio.net
- MindSpring: smtp.mindspring.com
- MindSpring: mail.mindspring.com
- Mistral: smtp.mistral.co.uk
- MSN: smtp.email.msn.com
- MSN DSL: secure.smtp.email.msn.com
- NamesToday: smtp.namestoday.ws
- Netcom.com: smtp.ix.netcom.com
- Netreach.net: smtp.netreach.net
- Netscapeonline: mailhost.netscapeonline.co.uk
- NetSet: mail.netset.com
- NetWalk.com: mail.netwalk.com
- Netzero.net: smtp.netzero.net
- Nextek.net: mail.nextek.net
- Nildram: smtp.nildram.co.uk
- Nni.com: nni.com
- Northstar Data Systems: mail.nn.net
- NTL World: smtp.ntlworld.com
- OneTel: mail.onetel.net.uk
- OneTel: mail.onetel.com
- On-Ramp: mail.marion.net
- Ozemail.com.au: smtp.ozemail.com.au
- Pacbell/Pacific Bell: smtp.pacbell.yahoo.com
- Peoplepc: mail.peoplepc.com
- Phone Co-op: smtp-1.opaltelecom.net
- Pipex: smtp.dial.pipex.com
- Plus Net: relay.plus.net
- Prodigy: smtp.prodigy.yahoo.com
- Qwest Internet Service: pop.dnvr.qwest.net
- Purplenet: smtp.purplenet.co.uk
- Rcn.com: smtp.rcn.com
- Redbird.net: mail.redbird.net
- RichNet: mail.richnet.net
- Road Runner: smtp-server.rr.com
- Screaming.Net: smtp.tiscali.co.uk
- Spire: mail.spire.com
- SprintLink: smtp.a001.sprintmail.com
- Supanet: smtp.supanet.com
- Telewest: smtp.blueyonder.co.uk
- Telocity: mail.telocity.com
- Tesco: smtp.tesco.net
- Tesconet: mail.tesco.net
- Tiscali: smtp.tiscali.co.uk
- Totalise: mail.totalise.co.uk
- TPG.com.au: mail.tpg.com.au
- TTLC: mail.ttlc.net
- UKGateway: smtp.ukgateway.net
- Uu.net: uu.net
- V 21: smtp.v21.co.uk
- Verizon: outgoing.verizon.net
- Virgin: smtp.virgin.net
- Vispa: mail.vispa.com
- voicenet.com: mail.voicenet.com
- Waitrose: smtpmail.waitrose.com
- Wanadoo: smtp.wanadoo.fr
- Webcom: smtp.webcom.com
- Which Online: mail.which.net
- Wide Open West: smtp.mail.wowway.com
- Wide Open West (users with @wideopenwest.com): smtp.mail.wideopenwest.com
- Worldonline: smtp.tiscali.co.uk
- Yahoo: smtp.mail.yahoo.com