Reading time: 7 min · Last verified: July 2026 · SMTPedia editorial team
Proximus.be is the email service tied to Proximus, Belgium’s main telecom operator (which absorbed the legacy Skynet.be brand). To connect a Proximus mailbox to Outlook, Thunderbird, Apple Mail, or a mobile client, use the server settings below along with your Proximus MyProximus account credentials.
Skynet.be email accounts still work on Proximus infrastructure. If you have a legacy @skynet.be address, use the settings on this page with your MyProximus login. Free (non-customer) mailboxes have been phased out for new signups; only paying Proximus customers can create new email addresses. Existing accounts are unaffected. For related bounce codes when authentication fails, see the SMTP 550 5.7.1 guide.
Quick Reference: Proximus.be Server Settings
Use the values below verbatim. Every protocol requires encryption; plain-text ports 25, 110, and 143 are blocked or discouraged.
| Protocol | Server | Port | Encryption | Authentication |
|---|---|---|---|---|
| SMTP (outgoing, most common) | smtp.proximus.be | 465 (SSL) or 587 (STARTTLS) | Required | Full email + MyProximus password |
| IMAP (incoming, recommended) | imap.proximus.be | 993 | SSL/TLS | Full email + MyProximus password |
| POP3 (incoming, single device) | pop.proximus.be | 995 | SSL/TLS | Full email + MyProximus password |
Proximus.be SMTP Settings (Sending Mail)
SMTP is the outbound protocol for mail clients, WordPress SMTP plugins, and any app sending through your Proximus mailbox. The server is smtp.proximus.be on port 465 with SSL or 587 with STARTTLS. Authentication is required; use your full user@proximus.be (or legacy @skynet.be) address as username and your MyProximus password.
Two operational notes. The SMTP server is only reachable if the Proximus service tied to the mailbox is still active. Since Proximus tightened its policy in 2023, new mailboxes are only created for paying Proximus internet customers; existing free @skynet.be addresses still work but cannot be re-created. If SMTP returns 535 5.7.8 even with correct credentials, the underlying subscription may have lapsed. Related bounce reference: SMTP 550 5.7.1 guide.
Proximus.be IMAP Settings (Recommended for Reading)
IMAP synchronizes folder state across every device. The server is imap.proximus.be on port 993 with SSL/TLS. Use your full email as username and your MyProximus password. Standard IMAP folder mappings apply, so Sent, Drafts, and Trash appear where clients expect them; the labels are French, Dutch, or English depending on your account language setting inside MyProximus.
Proximus.be POP3 Settings (Single-Device Access)
POP3 downloads mail to one device without server-side sync afterwards. The server is pop.proximus.be on port 995 with SSL/TLS. Proximus keeps a server copy after POP3 download by default; enable “delete from server on download” only when you specifically want messages purged. For any multi-device setup, IMAP is a better fit.
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 recover a forgotten Proximus password?
Reset your MyProximus password at proximus.be through the “Wachtwoord vergeten? / Mot de passe oublié?” link. Proximus sends a reset code to your registered mobile number. Once reset, update it in every mail client; the old password stops working immediately for SMTP and IMAP.
Can I use Proximus mail on several devices at once?
Yes, use IMAP (port 993, SSL/TLS) on every device. Read status, folder moves, and drafts stay in sync across your phone, tablet, and desktop. Avoid mixing POP3 on one device with IMAP on another; POP3 clients set to delete on download will remove messages before your other devices sync them.
What if outbound Proximus mail lands in recipients’ spam?
Proximus outbound reputation is generally strong, but individual mailboxes can be flagged if they send too many messages too quickly. Ask the recipient to mark one message as “Not spam” and add your address to their contacts. If the problem persists across several recipients, verify the sender name and check that MyProximus has not restricted outbound sending on the account.
What is the attachment size limit?
Proximus caps attachments at 20 MB per outgoing message, and rejects incoming messages larger than 25 MB. For anything bigger, use a file-sharing link (Proximus offers a “Cloud” service, or use any third-party). Some recipients’ servers may impose their own limits on incoming size, so a message that leaves Proximus successfully can still bounce on the far end.
How do I enable two-factor authentication?
Sign in to MyProximus, open the security section, and enable two-step verification. Once 2FA is on, mail clients that use standard IMAP/POP/SMTP authentication may need to re-authenticate the first time they connect; that is expected. Keep a backup recovery code somewhere safe: losing your second factor without one requires a support call to restore access.
About This Guide
The Proximus.be email settings on this page were last verified on July 23, 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 Proximus. If you find a discrepancy between what is documented here and what Proximus 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.
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