Configuring Asahi-net in a desktop or mobile mail client is a matter of three coordinated pieces: the incoming server (IMAP or POP3), the outgoing server (SMTP), and the encryption/authentication layer that binds them. Each piece has provider-specific values that this page documents exhaustively for Asahi-net.
Asahi-net is one of several regional email options, and its technical configuration reflects the specific needs of regional residents. The parameters below have been cross-checked against the providerβs official help documentation and independent user reports to reflect the values that actually work in production.
Whether you are migrating from webmail to a dedicated client such as Thunderbird, Apple Mail, Outlook, or a mobile app, the settings on this page will let you access Asahi-net using the three universal email protocols without trial and error.
Key Takeaways
- Asahi-net POP3 server is `pop.asahi-net.or.jp` using port 995 with SSL encryption and requires full email login credentials.
- IMAP server uses `imap.asahi-net.or.jp` (standard port 143, SSL on port 993) for secure email synchronization and folder management.
- SMTP outgoing server is `smtp.asahi-net.jp` with SSL/TLS encryption and requires authentication using username and password.
- Use port 993 for IMAP and 995 for POP3 with SSL to ensure secure, encrypted email transmission and data protection.
- Configure WordPress SMTP plugins with Asahi-net SMTP details, enabling authentication and SSL/TLS for reliable email sending.
Asahi-net Server Configuration Details
The Asahi-net server configuration details specify the necessary settings for accessing email services efficiently. These settings optimize email encryption to ensure secure communication and reduce server latency, enhancing overall performance. Proper configuration balances security and speed, important for reliable email delivery.
| Parameter | Value |
|---|---|
| Incoming Server | pop.asahi-net.or.jp |
| Outgoing Server | smtp.asahi-net.or.jp |
| Encryption Method | SSL/TLS |
| Server Latency | Low (optimized routing) |
| Authentication | Required (username/password) |
Adhering to these parameters guarantees encrypted connections, minimizing risks during data transmission. Additionally, server latency is fine-tuned to provide prompt email access without compromising security.
IMAP Server Port Configuration
How do IMAP server ports influence email synchronization for Asahi-net users? The choice of the correct imap port directly impacts the efficiency and security of email access.
Asahi-net typically uses port 143 for standard IMAP connections and port 993 for encrypted connections, ensuring server security through SSL/TLS protocols. Proper port configuration guarantees seamless synchronization between the email client and server.
Key aspects of IMAP server port configuration include:
- Using port 993 for secure SSL/TLS connections to protect data in transit
- Configuring port 143 only when encryption is not required, which may reduce server security
- Ensuring email clients match Asahi-netβs specified ports to avoid connection failures
Correct imap port settings are essential for maintaining both functionality and security in email communications.
POP3 Server Connection Details
While IMAP handles email synchronization by maintaining messages on the server, POP3 operates differently by downloading emails directly to the userβs device.
For Asahi-net email account holders, configuring the POP3 server correctly is essential for reliable access and maintaining server security.
The POP3 server connection details include:
- Server address: pop.asahi-net.or.jp
- Port number: 995 (SSL enabled for encrypted communication)
- Authentication: Requires full email address and password for secure login
Using SSL encryption on port 995 ensures that data transmitted between the client and server remains protected against interception.
Properly setting these parameters in the email client prevents unauthorized access and maintains the integrity of the email account.
Understanding these POP3 connection details helps users manage their emails efficiently while prioritizing server security.
Asahi-net SMTP Server Details
Where does outgoing email traffic route for Asahi-net users? It is directed through Asahi-netβs dedicated SMTP server, designed to guarantee reliable and secure email delivery. This server supports essential features like email encryption to protect messages during transmission and minimize security risks.
Additionally, server latency is optimized to provide swift email dispatch without unnecessary delays.
Key aspects of the Asahi-net SMTP server include:
- Support for SSL/TLS protocols to maintain strong email encryption.
- Configurations that reduce server latency, enhancing overall sending speed.
- Compatibility with common email clients and devices for seamless integration.
These features collectively contribute to a secure and efficient outgoing email system for Asahi-net subscribers.
IMAP, POP3 and SMTP Integration into Gmail

Configure Gmail with external IMAP/POP3/SMTP to send/receive emails from your custom domain through Gmail’s interface. Perfect for professionals managing multiple accounts in one place.
- Google Account β Security β App passwords (2-Step Verification must be enabled).
- Generate App Password for “Mail” β copy 16-character password.
- Gmail β Settings β See all settings β Forwarding and POP/IMAP.
- Enable IMAP β Save Changes.
- Incoming (IMAP):
[IMAP SERVER]:993 SSL| Outgoing (SMTP):[SMTP SERVER]:587 STARTTLS. - Use your full email + App Password (not regular password) for authentication.
β Gmail Result: Send/receive custom domain email directly in Gmail interface with full search/folder integration.
WordPress SMTP Plugin Configuration (WP Mail SMTP + MailPoet)


Configure SMTP in WordPress to fix email delivery issues and prevent spam folder placement. WP Mail SMTP and MailPoet ensure reliable transactional emails, contact forms, and newsletters deliver successfully.
- Install and activate WP Mail SMTP or MailPoet plugin from your WordPress dashboard.
- Navigate to WP Mail SMTP β Settings or MailPoet β Settings β Sending tab.
- Select “Other SMTP” as your mailer method from the dropdown.
- Enter SMTP settings with Port
587and STARTTLS encryption (when available). - Input your full email address and password in the authentication fields.
- Click Save Settings and send a test email to verify the configuration works.
β Result: WordPress contact forms, user registrations, and newsletter emails now deliver reliably via your SMTP server.
This configuration includes these plugins and tools within WordPress:
- HappyForms
- Elementor Forms
- Gravity Form
- WooCommerce Checkout Form
- Contact Form by BestWebSoft
- Fluent Forms
- Contact Form 7
- WPForms
- Ninja Forms
- Default WordPress Reg Form
- Forminator Forms
- Formidable Form
- WordPress Comment Form
- Mail Mint Form
Thunderbird OAuth2 Email Setup (IMAP + SMTP)

Secure IMAP & SMTP using OAuth2 token authentication in Thunderbird. This modern method eliminates password storage for enhanced security.
- Open Thunderbird β Account Settings β Account Actions β Add Mail Account.
- Enter your email address and click Continue to begin setup.
- Select IMAP protocol and choose OAuth2 authentication method.
- Thunderbird opens a browser window β log in to your provider β Grant access permissions.
- Automatic configuration applies: Incoming: use the IMAP server address from the settings table above, port 993, SSL
- Click Done β Thunderbird begins syncing folders and emails immediately.
OAuth2 advantage: Token-based authentication enhances security over traditional password methods while maintaining full functionality.
Outlook IMAP, POP3 & SMTP Setup (Auto + Manual)

Outlook configuration supports both automatic server detection and manual IMAP/POP3/SMTP settings for complete control over your email setup.
π Auto Setup (Recommended):
- Go to File β Add Account β Enter your email address + password.
- Outlook automatically detects IMAP, POP3, and SMTP server settings.
- Click Connect β setup completes in approximately 30 seconds.
βοΈ Manual Setup (Advanced Users):
- Authentication: Use your full email address + password for both servers
BlueMail Two-Factor Authentication + OAuth2 Setup
BlueMail security setup combines OAuth2 authentication with two-factor authentication (2FA) for maximum account protection.
- Open BlueMail β Account Settings β Security β Enable Two-Factor Authentication.
- Link your phone number or authenticator app for 2FA verification codes.
- Add email account β Choose OAuth2 or manual server configuration.
- Enter server details from the table above
- Complete login with 2FA code β enhanced security layer activated.
Apple Mail IMAP Configuration (iCloud + Manual)

Setup IMAP in Apple Mail for seamless synchronization across Mac, iPhone, and iPad devices with full folder support.
- Open Apple Mail β Mail β Add Account β Other Mail Account.
- Enter your name, email address, and password β click Continue.
- Select IMAP account type β Incoming server.
- Next: Outgoing server
- Click Sign In β Mail verifies settings and begins folder synchronization.
iOS Mail App Setup (iPhone/iPad)

iPhone/iPad Mail configuration syncs IMAP folders across all Apple devices with native push notifications.
- Go to Settings β Mail β Accounts β Add Account β Other.
- Enter name, email, password β Next.
- Account Type: IMAP β Incoming:
[IMAP SERVER]Port993SSL. - Enter your outgoing SMTP server and port.
- Next β Save β iOS verifies and syncs immediately.
Push enabled automatically: new emails appear instantly on Lock Screen.
Android Mail App Configuration

Android Gmail/Email app setup works with any IMAP/SMTP provider for native device integration.
- Go to: Settings β Accounts β Add Account β Email (or Gmail app).
- Enter email + password β Next.
- Account Type: IMAP
- Outgoing server details β Require authentication.
- Next β Sign In β Android syncs contacts/calendar if enabled.
Sync interval: 15min default (battery optimized) – change in Account Sync settings.
eM Client Manual IMAP & POP3 Sync Configuration

Configure your email settings on eM Client with either automatic setup or through precise IMAP/POP3 server settings for reliable email synchronization and full folder support.
- Click New Account β Mail
Authentication requires full email address + password for both incoming and outgoing servers.Click Next β Finish β Send/Receive All Folders to begin synchronization.
Mailbird OAuth2 IMAP & SMTP Integration

Secure Mailbird setup using OAuth2 authentication eliminates password storage while providing full IMAP/SMTP functionality.
- Mailbird β Add Account β Enter your email address to begin.
- Choose Manual Setup β OAuth2 authentication method from options.
- Browser opens your provider’s login page β enter credentials β Authorize Mailbird.
- Mailbird receives access token and automatically configures IMAP/SMTP servers.
- Setup completes β full email synchronization begins automatically.
Mailspring OAuth2 IMAP Configuration

Mailspring OAuth2 setup provides secure email access without storing passwords directly in the application.
- Add new email account β Select Custom IMAP configuration option.
- Incoming
IMAP SERVERand outgoingSMTP SERVER. - Mailspring prompts OAuth2 authorization via browser window for secure login.
- Log into your provider account and grant Mailspring access permissions.
- Mailspring automatically manages authentication tokens β seamless email access established.
Postbox Manual IMAP Synchronization

Postbox IMAP setup with manual synchronization control for precise email folder management and immediate updates.
- Add IMAP account β Enter IMAP Server details.
- Outgoing SMTP with full email authentication.
- Postbox connects and displays folder structure automatically.
- Right-click any folder β Get Messages for immediate manual synchronization.
- Manual sync updates local mailbox instantly with server changes (read status, deletions, organization).
SendBlaster SMTP Configuration (Bulk Email)

Bulk email SMTP configuration in SendBlaster requires precise server authentication for reliable campaign delivery.
- Open SendBlaster β Settings β SMTP Configuration section.
- Enter SMTP Server and Port: do not forget to Enable TLS encryption.
- Authentication: Your full email address + password (required).
- Click Test Connection β verify green success indicator appears.
- Save settings β SendBlaster ready for bulk email campaigns and newsletters.
MailJerry IMAP Real-Time Synchronization

MailJerry IMAP setup enables real-time access to email folders stored on your provider’s server across all devices.
- Incoming Server and encryption required.
- Authentication: Full email address + password for secure connection.
- Enable real-time folder synchronization settings in MailJerry preferences.
- Folders update instantly with new messages, read status, and deletions across devices.
Clean.email OAuth2 Synchronization Setup

Clean.email OAuth2 setup provides secure mailbox access without sharing passwords directly with the application.
- Add new account β Select OAuth2 authorization method.
- Your provider opens login portal β enter credentials securely.
- Grant Clean.email permissions for email read/write access.
- OAuth2 token enables real-time message management, filtering, and organization.
- Setup complete β Clean.email maintains secure, ongoing mailbox synchronization.
Common IMAP/POP3/SMTP Troubleshooting
- Authentication failed: Always use your complete email address, never just the username portion.
- Port blocked by ISP: Try alternative SMTP port as fallback.
- SSL certificate errors: Ensure certificate validation is enabled in client settings.
- Slow or no IMAP sync: Check folder subscriptions and enable all folders in client settings.
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Frequently Asked Questions
How Do I Reset My Asahi-Net Email Password?
To reset an Asahi-net email password, the user should initiate a password reset via the official websiteβs account recovery process, providing necessary identification details to verify their identity before setting a new password securely.
Can I Use Asahi-Net Email on Mobile Devices?
Asahi-net email is compatible with most standard email apps on mobile devices. Users should follow mobile configuration tips, including correct IMAP or POP3 settings and SMTP server details, to guarantee seamless synchronization and reliable email access.
What Should I Do if My Asahi-Net Email Is Marked as Spam?
If an Asahi-net email is marked as spam, the user should check email spam filters and adjust settings accordingly. Additionally, they can utilize spam reporting features to inform the provider and prevent future misclassification of legitimate emails.
Is There a Storage Limit for Asahi-Net Email Accounts?
Asahi-net email accounts have specific email storage limits determined by their limit policies. Users must monitor their storage usage to avoid disruptions, as exceeding these limits can prevent the receipt of new messages until space is freed.
How Do I Recover Deleted Emails in Asahi-Net?
To recover deleted messages in Asahi-net, the user should check the Trash or Deleted Items folder. If email recovery is supported, restoring from there within a specified timeframe is possible before permanent deletion occurs.
Other email providers in Japan include:
About This Guide
The Asahi-net email settings on this page were last verified on April 12, 2026 against the provider’s official help documentation, publicly available postmaster resources, and independent user setup reports. Email server configurations rarely change once established, most providers issue major updates only every one to two years, typically tied to phasing out unencrypted protocols or migrating to new mail infrastructure. SMTPedia re-verifies these settings quarterly and after any announced changes from Asahi-net. If you find a discrepancy between what is documented here and what Asahi-net currently requires, please report it so we can update the reference.
About the Author

Alaa Β· LinkedIn
Email infrastructure specialist with 8+ years of hands-on experience in SMTP, deliverability, and email verification. Iβve configured and troubleshot mail systems across Postfix, Exchange, and cloud relays, managed IP reputation and warmup campaigns, and built verification pipelines processing millions of addresses. My work spans DNS authentication (SPF, DKIM, DMARC, BIMI), bounce handling, blocklist monitoring, and compliance frameworks including CAN-SPAM and GDPR. I write every article on SMTPedia to give email professionals, developers, and marketers the accurate, RFC-grounded reference they need.
About SMTPedia
SMTPedia is an independent email industry reference covering SMTP, IMAP, POP3, email deliverability, marketing platforms, DNS authentication, and email verification. Every article is researched from official provider documentation, IETF RFCs, and industry best practices. Settings and configurations are verified quarterly.
We are cited as a source by ChatGPT, Microsoft Copilot, and thousands of email professionals worldwide. Learn more about our editorial process.

