Member Avatar for matilda21

I have a new pc with windows vista and am unable to send emails, I can recieve them ok. I have contacted isp and they have checked everything and cant do anymore for me. I am running new pc with vista and another pc with xp professional through a D-Link 524 wireless router. Any ideas on what the problem might be would be great.

Thanks .

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A compact, practical addendum for the "can receive but cannot send" Vista case (thread contributions from and , and the follow-up by ). The items below prioritize quick isolation and safe fixes that are often missed when the client can receive but fails on outgoing SMTP.

  • Isolation first: confirm whether sending works from the ISP's webmail or from another machine on the same network. If webmail sends but the Vista client does not, the problem is local to that PC or its client. If nothing on the network can send, focus on the router/modem or ISP path.
  • Security software: many mail-send problems are caused by third-party antivirus or outbound-firewall features that intercept SMTP. A controlled test is to temporarily disable the AV/firewall, attempt to send, then re-enable protection immediately. If sending is restored, look for "mail shield", "email scanning" or "outgoing protection" settings in the security product and add the mail client or SMTP host as an exception.
  • Check basic connectivity to the SMTP host (port reachability). From the Vista PC a simple TCP test shows whether the SMTP port is reachable. Example (if telnet is available):
    telnet smtp.example.com 25

    A successful TCP connect or SMTP banner means the network path is open; failure points to ISP/router blocking or a local firewall.

  • Router and ISP considerations: try connecting the Vista PC directly to the modem to rule out router-level filters or firmware bugs. Some ISPs block port 25; using submission ports (587) or SSL/TLS ports per the ISP's documentation is the usual workaround.
  • Gather exact evidence: enable client connection/logging and copy the full SMTP response and numeric error code when send fails. That text, plus client name/version, SMTP host, port and security mode, is what responders need for a precise diagnosis.

If security software is implicated, update or reconfigure it rather than leaving protection disabled. When posting for more help, include the exact SMTP error text and the tests above so the root cause can be identified quickly.

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Member Avatar for cguan_77

hi if your using outlook 2007 there;s an option there to check if you can connect to your mail server just go to options there's one button there its something like Test you mail account system.. or check out your e-mail configuration setup... make sure that everything is set correctly..

Member Avatar for digitalocksmith

Yup, as cguan_77 suggests, SMTP is the outgoing mail server ..Make sure that your ISP's correct domain name is listed in the box labelled 'Outgoing mail server (SMTP).

It should be the same domain name as the incoming mail server (POP3).

Good Luck!

Member Avatar for digitalocksmith

Sorry....for windows vista mail select tools/accounts, highlight your mail address then click 'properties' and select the 'servers' tab.....this should let you set your correct ISP mail server domains for SMTP (same as POP3) in the boxes provided.

Member Avatar for matilda21

Thanks for that. it turned out to be bull-guard anti-virus stopping it.

Member Avatar for digitalocksmith

lmao......yeh! that'll do it too.

Glad you were able to nail the issue, nice work!

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