What if SMTP Port 25 is being blocked

Q: What can I do if port 25 is blocked?

A: You may also choose to use the alternate Port 587. All of our customers should contact their ISP (Internet Service Provider) if Port 25 is blocked.  In many instances, they will let you use their outgoing SMTP servers.

Resources

List of common SMTP Servers:

  • AOL - smtp.aol.com
  • Adelphia - smtp.blk.adelphia.net
  • AT&T - mailhost.worldnet.att.net
  • Charter Communications - smtp.charter.net
  • Comcast - smtp.comcast.net
  • Netzero - smtp.netzero.net
  • PacBell - mail.pacbell.net
  • PeoplePC - mail.peoplepc.com
  • Verizon - outgoing.verizon.net
  • Yahoo - smtp.mail.yahoo.com
  • Juno - smtp.juno.com
  • SprintPCS - smtp.sprintpcs.com
  • SpeakEasy - mail.speakeasy.net

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