Altibox is a Norwegian fiber broadband operator, part of the Lyse group, that sells its service through regional partner companies. An email address comes with the subscription; depending on the partner it ends in @altibox.no or in a partner domain (for example @lyse.net). To use it in Outlook, Thunderbird, Apple Mail or a phone, use the settings below with the address and password you find on Mine sider, under Altibox selvbetjening.
Outgoing mail only works with login enabled. Altibox requires authentication on smtp.altibox.no to block spam and phishing: tick “My outgoing server requires authentication” (in older Outlook versions, “Require logon using Secure Password Authentication”) or the equivalent setting in your client. You must also send from your own Altibox address; a client set to send as another address, such as a Gmail one, through Altibox’s server will be refused. Reference: SMTP 550 5.7.1 troubleshooting.
Quick Reference: Altibox.no Server Settings
These are the values Altibox publishes in its official setup guide. Username is your full email address.
| Protocol | Server | Port | Encryption | Authentication |
|---|---|---|---|---|
| IMAP (incoming, recommended) | imap.altibox.no | 993 | SSL/TLS | Full email + email password |
| SMTP (outgoing) | smtp.altibox.no | 465 | SSL/TLS | Required: full email + email password |
| POP3 (incoming, not recommended) | pop.altibox.no | 995 | SSL/TLS | Full email + email password |
Altibox.no SMTP Settings (Sending Mail)
The outgoing server is smtp.altibox.no on port 465 with SSL/TLS, the only port listed in Altibox’s guides. Authentication is mandatory: use your full Altibox address as the username and your email password. The From address must be your Altibox address; to send as another address from your mail client, use that provider’s own outgoing server instead.
Altibox does not publish a daily sending limit. Its SMTP service is meant for personal mail; newsletters and bulk sending need a dedicated email service.
Altibox.no IMAP Settings (Recommended for Reading)
Altibox recommends IMAP. The server is imap.altibox.no on port 993 with SSL/TLS. IMAP keeps the same folders and read status on every device and in webmail at mail.altibox.no.
Altibox.no POP3 Settings (Single-Device Access)
Altibox writes that it does not recommend POP3. If an older setup still uses pop.altibox.no, its help center advises switching to imap.altibox.no where possible, and checking that the client is not set to delete messages from the server, otherwise mail disappears from webmail and other devices.
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 → Security → App passwords (2-Step Verification must be enabled).
- Generate App Password for “Mail” → copy 16-character password.
- Gmail → Settings → See all settings → Forwarding and POP/IMAP.
- Enable IMAP → 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.
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 → Settings or MailPoet → Settings → 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.
Result: WordPress contact forms, user registrations, and newsletter emails now deliver reliably via your SMTP server.
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 → Account Settings → Account Actions → Add Mail Account.
- Enter your email address and click Continue to begin setup.
- Select IMAP protocol and choose OAuth2 authentication method if your provider supports it (Gmail, Microsoft and Yahoo do; many smaller providers do not, in which case choose Normal password).
- Thunderbird opens a browser window → log in to your provider → Grant access permissions.
- Automatic configuration applies: Incoming: use the IMAP server address from the settings table above, port 993, SSL
- Click Done → 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.
Auto Setup (Recommended):
- Go to File → Add Account → Enter your email address + password.
- Outlook automatically detects IMAP, POP3, and SMTP server settings.
- Click Connect → setup completes in approximately 30 seconds.
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 → Account Settings → Security → Enable Two-Factor Authentication.
- Link your phone number or authenticator app for 2FA verification codes.
- Add email account → Choose OAuth2 or manual server configuration.
- Enter server details from the table above
- Complete login with 2FA code → 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 → Mail → Add Account → Other Mail Account.
- Enter your name, email address, and password → click Continue.
- Select IMAP account type → Incoming server.
- Next: Outgoing server
- Click Sign In → 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 → Mail → Accounts → Add Account → Other.
- Enter name, email, password → Next.
- Account Type: IMAP → Incoming:
[IMAP SERVER]Port993SSL. - Enter your outgoing SMTP server and port.
- Next → Save → iOS verifies and syncs immediately.
New mail checks: for standard IMAP accounts, iOS Mail checks for new mail on the schedule set under Fetch New Data in the Mail account settings; instant push is only offered for some account types, such as iCloud and Exchange.
Android Mail App Configuration
Android Gmail/Email app setup works with any IMAP/SMTP provider for native device integration.
- Go to: Settings → Accounts → Add Account → Email (or Gmail app).
- Enter email + password → Next.
- Account Type: IMAP
- Outgoing server details → Require authentication.
- Next → Sign In → 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 → Mail
Authentication requires full email address + password for both incoming and outgoing servers.Click Next → Finish → 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 → Add Account → Enter your email address to begin.
- Choose Manual Setup → OAuth2 authentication method from options.
- Browser opens your provider’s login page → enter credentials → Authorize Mailbird.
- Mailbird receives access token and automatically configures IMAP/SMTP servers.
- Setup completes → 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 → 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 → 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 → Enter IMAP Server details.
- Outgoing SMTP with full email authentication.
- Postbox connects and displays folder structure automatically.
- Right-click any folder → 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 → Settings → 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 → verify green success indicator appears.
- Save settings → 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 → Select OAuth2 authorization method.
- Your provider opens login portal → enter credentials securely.
- Grant Clean.email permissions for email read/write access.
- OAuth2 token enables real-time message management, filtering, and organization.
- Setup complete → 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.
More Popular Email Settings Guides
| Guide | Region | Type |
|---|---|---|
| T-Online.de SMTP Settings | Germany | ISP |
| Fibertel.com.ar Webmail | Argentina | ISP |
| QQ Mail SMTP Server | China | Global |
| Volny Mail Settings | Czech Republic | ISP |
| Freemail.hu IMAP Settings | Hungary | Regional |
| Etisalat/EIM Mail Settings | UAE | ISP |
| Hotmail IMAP Settings | Global | Global |
| 126.com IMAP Server Settings | China | Regional |
| Waoo Mail SMTP/IMAP | Denmark | ISP |
| GMX SMTP Server Settings | Global | Global |
| 163.com IMAP Server Settings | China | Regional |
| Webmail.co.za IMAP Settings | South Africa | Regional |
Frequently Asked Questions
Where do I find my Altibox email address and password?
Log in to Mine sider on your Altibox partner’s website. Your email accounts are listed under Altibox selvbetjening, where you can also set or change the password and create additional addresses.
Why can I receive but not send?
Usually because SMTP authentication is not enabled in the client, or because the client sends from a non-Altibox address. Turn on “My outgoing server requires authentication”, check that the server is smtp.altibox.no on port 465 with SSL/TLS, and that the From address is your Altibox address.
Does Altibox mail support OAuth2?
Altibox documents only password login for IMAP and SMTP. Choose normal password authentication in your mail client.
What is the attachment size limit?
Altibox’s webmail user guide gives a maximum of 18 MB per attachment. Larger files are better shared through a cloud storage link.
Where is Altibox webmail?
At mail.altibox.no. Log in with your full email address and email password. Settings such as forwarding, signatures and external IMAP accounts are under Innstillinger.
About This Guide
The Altibox settings on this page were verified in November 2026 against Altibox’s official setup guides (altibox.no and kundeservice.altibox.no) and its webmail user guide. SMTPedia re-verifies these settings regularly; if you find a discrepancy, please report it so we can update the reference.
Other webmails in Norway:
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Alaa · LinkedIn
Email infrastructure specialist with 8+ years of hands-on experience in SMTP, deliverability, and email verification. I’ve 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.
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