In Outlook i can send email through my ISP's SMTP but not able to send emails using your SMTP? Help Desk and Support System

18 Jun 2013

Support Center » Knowledgebase » In Outlook i can send email through my ISP's SMTP but not able to send emails using your SMTP?

	In Outlook i can send email through my ISP's SMTP but not able to send emails using your SMTP?

Solution Over the last few years, more and more ISP's have started to require their subscribers to use their SMTP server to send mail.
This allows them to monitor spammers, and help to reduce to the overwhelming amounts of spam and exploitation that occurs daily with email. Please note that there is no real workaround. You may want to contact your ISP to see if they are willing to work with you on this issue.
If you can not send email using our servers, check on this list below for your ISP or perform the test listed below.
Provided with each ISP that blocks, is their respective SMTP server setting.

This list has been compiled by the Support staff over the last year. It is not an official release of ISPs that require that there clients use their SMTP servers, however, it is as accurate as possible at this time.

Testing SMTP server access:

1.) Access a command line (in Windows, Click Start -> Run, and then type in CMD)
2.) Type in TELNET DOMAIN.COM 25 (replace DOMAIN.COM with your actual domain name)

If you are not being blocked from your ISP, you should see the message somwhat as follows:
20-radiations.coolbluehost.com ESMTP Exim 4.52 #1 Wed, 14 Dec 2005 22:59:07 +0530
220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.

If you do not see this error message, your ISP is very likely blocking the ability to send mail through servers other than theirs.

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.
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
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
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.

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31 Mar 2006 12:32 AM

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