My ISP Blocks Outgoing Email

From DatabaseDesigns

Some ISPs block outgoing email. A symptom of this problem will be an inability to send mail with the above settings (this could also be due to any of several other problems). To find out if this is the case for you, click Start -> Run... and type telnet octavia.dbdes.net 25. You should see 

220 octavia.dbdes.net ESMTP Postfix

If not, then your ISP is blocking you. ISPs known to misbehave in this way include:

  • Earthlink
  • Verizon

If this is the case for you, make sure you are using port 587 to send mail, not the standard port 25. See the instructions for your mail client for details.

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