Outgoing Mail Submission Port

This page gives you information on how to send email through submission port, and precautions.

What is outgoing mail submission port (587)?

As one method to combat the sending of unsolicited email, some Internet providers are using Outbound Port 25 Blocking to prevent users of other Internet providers from being able to send email through port 25.

Asahi Net members using another Internet provider for their Internet connection, and finding that the Internet provider is employing Outbound Port 25 Blocking, will not be able to send their Asahi Net email.

In this case, using the Outgoing Mail Submission Port (587) will allow Asahi Net email to be sent.

It will be necessary to change some of your settings.

Usage precautions

  • You are asked to set the SMTP authentication settings. Submission port is unavailable in mailers which do not support the SMTP authentication.
  • In the following cases, there is no need for the submission port 587 setting.
    • If using an Asahi Net Internet connection service.
    • If sending of email is possible with the SMTP over SSL setting.
    • If not using an Asahi Net Outgoing mail server.
    • If the Internet provider is not using Outbound Port 25 Blocking.

How to Set Up

Use the following information (outgoing server and its port number) to set up your mailer.
If you are using the submission port, please do not use SSL (SMTP over SSL).

Outgoing Mail (SMTP) Server mail.asahi-net.or.jp
  • * If you are subscribed to Email Virus Check.
Port 587

How to set up mailers

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