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Getting 'relaying denied' messages when sending mail through domain |
Craig |
Usually when this happens, it takes one of 2 forms. Either you always receive this message or you receive this message, check mail, and then are able to send.
If you are not able to send ever, it is possible your ISp does not allow relaying at all. Many large ISPs are now blocking outgoing mail when it does not use their servers. See below for a list.
If you receive the relaying denied message but then are able to send mail once you have checked mail, then the following applies to you:
Not authenticated to the outgoing server
You need to make sure to check your mail via POP3 first, before you can be permitted to send. Checking any POP box at your domain will enable your computer's IP address to be permitted to send mail for a limited time. This is called "POP Authentication". As long as you check your mail before sending, or at least once every few hours, you can be sure your IP address is in our list of allowed relay clients.
ISP does not allow relaying
Some ISPs, notably Earthlink, AOL and others, do not allow you to send mail through any third party when connected to their service. To send mail you will likely need to use their SMTP servers instead of the one at your domain. Some of the larger ISPs have implemented a block on port 25 (SMTP mail) in a crude yet effective anti-spam measure. if you use an ISP who blocks port 25 you will likely not be able to send out through the mail server at your domain.
Here is a list of ISPS who block port 25 and what the outgoing mail server name needs to be listed as in your mail software:
AltaVista Free Access: email.1stup.com
AT&T WorldNet: mailhost.worldnet.att.net
DCAnet: postoffice.dca.net
EarthLink: mail.earthlink.net
MSN: smtp.email.msn.com
MindSpring: smtp.mindspring.com
NetZero: smtp.netzero.net
Prodigy: smtp.prodigy.net
Sprynet: smtp.sprynet.com
Verizon/GTE (Dial-Up): smtp.verizon.net
SBC/Pacific Bell: mail.pacbell.net
Frontiernet DSL: smtp.frontiernet.net
Cablevision/Optimum Online: mail.optonline.net
Note: you may still send mail via the WebMail interface regardless of your ISP. |
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