Reading time: 8 min · Last verified: August 2026 · SMTPedia editorial team
Rediffmail is the consumer webmail service from Rediff.com, one of India’s earliest internet companies founded in 1996 (NASDAQ-listed 1999, delisted 2016). Rediffmail operates two tiers: a free tier on @rediffmail.com and a paid business tier called Rediffmail Pro on @rediffmailpro.com. The tier your account belongs to dictates which protocols and hostnames are available, and the difference is significant. To connect Rediffmail to Outlook, Thunderbird, Apple Mail, or a mobile client, use the settings below matching your tier.
Free @rediffmail.com accounts cannot use IMAP under any configuration, only POP3 is exposed. IMAP access is a paid Rediffmail Pro feature (@rediffmailpro.com). If you have a free Rediffmail account and your client keeps failing to connect via IMAP, this is why, no server-side toggle can enable IMAP on the free tier. Use pop.rediffmail.com on port 995 SSL for POP3 incoming, or upgrade to Rediffmail Pro to gain IMAP access with imap.rediffmailpro.com. This tier distinction is not visible in most third-party setup guides but is documented in Rediff’s own support. Reference: SMTP 550 5.7.1 guide.
Quick Reference: Rediffmail Server Settings by Tier
Free Rediffmail (@rediffmail.com), POP3 + SMTP only
| Protocol | Server | Port | Encryption |
|---|---|---|---|
| SMTP (outgoing) | smtp.rediffmail.com | 465 (SSL) or 587 (STARTTLS) | Required |
| POP3 (incoming) | pop.rediffmail.com | 995 | SSL/TLS |
| IMAP | Not available on free tier, upgrade to Rediffmail Pro | ||
Rediffmail Pro (@rediffmailpro.com), IMAP + POP3 + SMTP
| Protocol | Server | Port | Encryption |
|---|---|---|---|
| SMTP (outgoing) | smtp.rediffmailpro.com | 465 (SSL) or 587 (STARTTLS) | Required |
| IMAP (incoming, recommended) | imap.rediffmailpro.com | 993 | SSL/TLS |
| POP3 (incoming, single device) | pop.rediffmailpro.com | 995 | SSL/TLS |
Rediffmail SMTP Settings (Sending Mail)
SMTP handles outbound mail. For free Rediffmail, use smtp.rediffmail.com, for Rediffmail Pro use smtp.rediffmailpro.com, both on port 465 SSL as the standard configuration or 587 STARTTLS as alternative. Authentication uses the full email address as username plus your Rediffmail account password.
Rediffmail enforces sending limits typical of a free consumer webmail on the free tier, with Rediffmail Pro tiers offering higher business-tier limits per user. Heavier transactional sending needs a dedicated SMTP relay outside Rediffmail.
Rediffmail IMAP Settings (Rediffmail Pro Only)
IMAP syncs folder state across every device. Server imap.rediffmailpro.com on port 993 SSL/TLS. IMAP is exclusive to Rediffmail Pro (paid) accounts, free @rediffmail.com accounts cannot use IMAP under any configuration. Folder names appear in English, and IMAP folder attributes let Outlook, Apple Mail, and Thunderbird map them to Sent, Drafts, and Trash correctly.
Rediffmail POP3 Settings (Available on Both Tiers)
POP3 downloads mail to one device with no server-side sync. Free tier uses pop.rediffmail.com, Pro tier uses pop.rediffmailpro.com, both on port 995 SSL/TLS. Free users must use POP3 since IMAP is not available. Enable “Leave a copy on the server” in your client’s POP3 configuration to prevent Rediffmail webmail from being emptied when your client fetches messages.
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.
More Popular Email Settings Guides
| Guide | Region | Type |
|---|---|---|
| T-Online.de SMTP Settings | π©πͺ Germany | ISP |
| Fibertel.com.ar Webmail | π¦π· Argentina | ISP |
| QQ Mail SMTP Server | π¨π³ China | Global |
| Volny Mail Settings | π¨πΏ Czech Republic | ISP |
| Freemail.hu IMAP Settings | ππΊ Hungary | Regional |
| Etisalat/EIM Mail Settings | π¦πͺ UAE | ISP |
| Hotmail IMAP Settings | π Global | Global |
| 126.com IMAP Server Settings | π¨π³ China | Regional |
| Waoo Mail SMTP/IMAP | π©π° Denmark | ISP |
| GMX SMTP Server Settings | π Global | Global |
| 163.com IMAP Server Settings | π¨π³ China | Regional |
| Webmail.co.za IMAP Settings | πΏπ¦ South Africa | Regional |
Frequently Asked Questions
Why can’t I set up IMAP on my free Rediffmail account?
Because IMAP is not available on the free Rediffmail tier at all. This is a business-model decision by Rediff to reserve IMAP for the paid Rediffmail Pro service (@rediffmailpro.com). Free @rediffmail.com accounts only expose POP3 for incoming mail. There is no server-side toggle to enable IMAP on the free tier. Your options are: (1) use POP3 with pop.rediffmail.com on port 995, (2) upgrade to Rediffmail Pro which unlocks IMAP, or (3) migrate to a mainstream provider that offers IMAP free (Gmail, Outlook.com, iCloud).
What is the difference between Rediffmail and Rediffmail Pro?
Rediffmail is the free consumer webmail service on the @rediffmail.com domain. Rediffmail Pro is the paid business tier on @rediffmailpro.com, offering business features including multiple email IDs per company, higher per-mailbox storage, IMAP access (unlike the free tier), and collaboration tools. Pro is priced per user per year, targeting Indian small and medium businesses. If you need email for a business or want IMAP, choose Pro. If you just need a personal free mailbox and POP3 is acceptable, the free tier works.
Should I use port 465 SSL or 587 STARTTLS for SMTP?
Both provide equivalent transport encryption in practice. Port 465 with implicit SSL/TLS is the traditional Rediffmail recommendation. Port 587 with STARTTLS is the RFC 6409 official standard for authenticated message submission. If your ISP or corporate firewall blocks port 465, use 587 as fallback. Both authenticate the same way with your full Rediffmail email address as username.
How do I reset my Rediffmail password?
Sign in to Rediffmail webmail at mail.rediff.com and use the password reset flow from the login screen. Recovery goes through the alternate email address or mobile number registered on your Rediffmail account. Rediff supports SMS-based verification for Indian mobile numbers. If you registered your account with only an alternate email and lost access to that too, contact Rediffmail customer support directly through the support page on rediff.com.
How secure is Rediffmail in transit?
Rediffmail enforces SSL/TLS on the encrypted mail ports (993, 995, 465) for client-to-server transport. Port 587 uses STARTTLS opportunistic encryption after connection. Server-to-server transport follows standard SMTP with STARTTLS. Native 2FA on IMAP or SMTP is not offered. Rediff infrastructure is India-hosted, subject to Indian data protection law (Digital Personal Data Protection Act 2023). For end-to-end message encryption use S/MIME or PGP client-side. Related: SMTP connection guide.
Other Indian email providers’ settings also include:
BSNL Email Settings · Yahoo Mail Email Settings · Gmail Email Settings
About This Guide
The Rediffmail email settings on this page were last verified on August 12, 2026 against Rediff’s official Rediffmail Pro documentation and independent Indian setup guides. 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 Rediff. If you find a discrepancy between what is documented here and what Rediffmail 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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