Submission Port
This page gives you information on how to send email through submission port, and its precautions.
What is submission port?
As a part of anti-spam measure, ISPs implement Outbound Port 25 Blocking (hereinafter referred to as OP25B) which restricts connection to external mail server by blocking port 25 for sending normal email.
If you are connected to the internet through a provider which implements OP25B, you will not be able to send email with normal settings from Asahi Net’s outgoing mail server.
By using submission port (port 587), you will be able to send email through Asahi Net’s outgoing mail server even when you are connected to the internet through a provider which is implementing OP25B.
Precautions
- There is a need to set the SMTP. Submission port cannot be used in mailers which do not support the SMTP.
-
If you meet either of the following conditions, this setting is not needed.
- You are subscribed to one of Asahi Net’s internet connection services.
- You have been able to send email from Asahi Net’s outgoing mail server with the SMTP over SSL setting.
- You are not using Asahi Net’s outgoing mail server.
- The provider for your internet connection is not implementing OP25B.
How to set up
Set your mailer as shown below.
If you are going to use the submission port, please do not enable SSL (SMTP over SSL).
| Outgoing mail server (SMTP) | mail.asahi-net.or.jp |
|---|---|
mails.asahi-net.or.jp
|
|
| Port | 587 |