Verizon: (please note that Verizon FIOS should not have any issues with SMTP blocking, only the DSL or other services) Road Runner (NYC): .com (for other states, and regions contact your Road Runner Support team) Megared ( Mexico): contact service provider for Settings. If you do not see this error message, your ISP is very likely blocking the ability to send mail through servers other than theirs.īell internet highspeed ( Canadian): ī ( Australian): contact service provider for Settings.īT Yahoo in the UK: contact service provider for Settings.Ĭharter Communications: Ĭinncinnati Bell/Fuse Dial-up: Ĭoax.net: /east / centralĬox:. If you are not being blocked from your ISP, you should see the following message:Ģ ESMTP Exim 4.34 #1 Fri, 13:20:48 -0700Ģ20-We do not authorize the use of this system to transport unsolicited, 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.ġ.) Access a command line (in Windows, Click Start -> Run, and then type in CMD on a MAC, use the Terminal application in the Applications/Utilities folder.)Ģ.) Type in TELNET DOMAIN.COM 25 (replace DOMAIN.COM with your actual domain name) This list has been compiled by the Support staff over the last year. Provided with each ISP that blocks, is their respective SMTP server setting.įOR A FIX AND WORK AROUND TO THIS PROBLEM, CLICK HERE If you can not send email using our servers, check on this list below for your ISP or perform the test listed below. You may want to contact your ISP to see if they are willing to work with you on this issue or try port 26 for your outbound email server settings which we have opened on our servers. This allows them to monitor spammers, and help to reduce to the overwhelming amounts of spam and exploitation that occurs daily with email. Over the last few years, more and more ISP's have started to require their subscribers to use their SMTP server to send mail.

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