Why can I receive emails but not send?

Updated 3 months ago by Theo Chu

If you can receive emails but not send them, there is a chance that your ISP (Internet Service Provider) is blocking third-party mail servers to prevent spam through their network. You can confirm by calling up your ISP and asking them if they are blocking third-party SMTP port 25. There are two workarounds to this issue:

  1. You can change the outgoing (SMTP) port to 26 to bypass ISP filtering
  2. You can use your ISP's SMTP mail server setting (ie. smtp.telus.net, smtp.shaw.ca etc.)

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