What is port 995?

Port 995 is a standard TCP/IP port used for secure email communication using the Secure Sockets Layer (SSL) cryptographic protocol or Transport Layer Security (TLS) on top of the standard Simple Mail Transfer Protocol (SMTP).

What is port 995?

How Port 995 Works

When you connect to a mail server using port 995, the connection is encrypted using SSL/TLS before any data is transmitted. This prevents unauthorized access to the contents of the email messages as they travel across networks and provides confidentiality.

Some key things to know about port 995:

  • It uses SSL/TLS encryption to secure email communications and ensure confidentiality
  • The port remains open and listens for client connections to the mail server
  • Email clients use port 995 to access email on servers securely
  • Common mail protocols that use port 995 include POP3, SMTP, and IMAP
  • The connection and authentication are secured before emails are downloaded locally

Port 995 and POP3/IMAP

The two most common protocols used with port 995 for downloading email are POP3 (Post Office Protocol version 3) and IMAP (Internet Message Access Protocol).

  • POP3 – Uses port 995 for “POP3S”. Downloads email messages to the local computer. Then usually deletes them from the server.
  • IMAP – Uses port 995 for “IMAPS”. Allows access to email messages on the server from the local mail client. Messages remain stored on email server.

So in both cases, connecting on port 995 establishes an encrypted session for securely accessing email.

Authentication for Port 995

Along with encryption using SSL/TLS, port 995 connections often employ an additional authentication method before allowing access to email messages.

Common authentication mechanisms include:

  • Username/password – The user types in their credentials which are securely transmitted and verified.
  • Client certificates – Digital certificates confirm the identity of the client accessing the server.
  • OAuth – The user authenticates through a trusted external identity provider.

This extra authentication verifies the user has permission to access the account securely.

Purpose of Port 995 for Secure Email

There are a few important reasons why port 995 is used specifically for encrypted email communications:

  • Security – SSL/TLS secures connections and encrypts all communication, preventing unauthorized access to sensitive emails.
  • Privacy – The contents of email messages are kept fully confidential when using port 995.
  • Client Compatibility – Most modern email clients and servers support TLS on port 995 for an encrypted transport.
  • Adoption of Standards – Port 995 conforms with standard and recommended secure configurations for email.

Overall, the purpose is to protect sensitive information in email using ubiquitous standards for encrypted connections. Accessing messages securely over these encrypted sessions prevents interception of confidential data.

Setting Up Port 995 for Email Clients

Configuring port 995 for an email application like Outlook allows exploiting the SSL/TLS encryption and security features:

  1. Verify server supports TLS on port 995

The email provider must have TLS implemented and active on port 995 for this to work properly.

  1. Input settings to match provider configurations

The settings like hostname/URL, username, authentication method need to match what your provider has setup on their backend email servers.

  1. Select encrypted options when adding account

When manually configuring your email account in the client, there will typically be a dropdown to select options like “SSL/TLS” or specifically port “995” for a secure connection.

  1. Save configurations

Double check all settings entered correctly correspond to the provider server setup before saving the account configuration.

Once finished, the email client will attempt a TLS secured connection over port 995 which should successfully connect if everything matches on both ends.

Email Clients and Port 995 Support

Most popular modern email services and applications have support for encrypted communications over port 995 using SSL or TLS:

  • Microsoft Outlook – Go to account settings → Change → More Settings → Use the following type of encrypted connection
  • Mozilla Thunderbird – Create new account → Encryption method → SSL/TLS
  • Apple Mail – Add account → Advanced → use SSL
  • Web Clients – Webmail services like Outlook, Yahoo Mail, Gmail enable SSL/TLS in account settings
  • Mobile Devices – iOS and Android devices also typically provide options to enable encrypted connection options

So nearly any device and email provider today allow leveraging port 995 for establishing secure encrypted connections just by toggling the appropriate account settings.

Port 995 vs Port 465 SMTP Configuration

Port 465 is also commonly used for encrypted SMTP email submission and operates very similarly to port 995. However there are some key differences:

Port 995 Port 465
Used for POP3S and IMAPS protocols Used for SMTPS protocol
Incoming server downloads email to client Outgoing server sends emails from client
Uses existing POP3/IMAP with added TLS Uses SMTP with TLS instead of standard SMTP
Emails stored on email server Emails submitted from client to server

So in summary:

  • Port 995 = Receiving emails securely
  • Port 465 = Sending emails securely

They both employ the same SSL/TLS encryption but serve opposite purposes – port 995 is for inbound messages to the client while port 465 is for outbound messages from a client. Configuring both ensures secure transmission in both directions.

Troubleshooting Issues with Port 995

Some common things to check when having problems connecting using port 995:

  • Firewall blocking port – Check networks firewalls are not blocking inbound/outbound traffic on port 995
  • Server not listening on port – Verify email server has TLS enabled and actively listening on port 995
  • Incorrect SSL/TLS settings – Double check the encryption configurations match on both the client and email server
  • Authentication failure – Confirm username, password, client certificates match the server side configurations
  • Unstable network – Switch between wifi and wired networks or cellular networks to rule out localized connectivity problems

If still unable to reliably connect, try contacting the email provider’s technical support for further troubleshooting.

Key Takeaways

  • Port 995 provides encrypted email access using SSL/TLS to secure sensitive communications traversing networks preventing snooping or alteration of messages.
  • POP3, IMAP, SMTP can all leverage TLS encryption on port 995 for incoming or outgoing email depending on what capabilities are implemented on the server side.
  • Modern email services and applications widely support TLS on port 995 making it easy to enable strong encryption.
  • Verify your local email client and remote email server both have the proper SSL/TLS settings matched to successfully connect securely over port 995.

This ubiquitous standard encryption protects confidentiality of your inbox and sent items when enabled on port 995 for secure email protocols.


Port 995 fills an important role in securing email communications to protect sensitive data in transit. By using ubiquitous SSL/TLS encryption standards supported by all major email clients and servers, it makes establishing an encrypted tunnel quite straightforward these days.

Transitioning from plain text email to encrypting on common ports like 995 using StartTLS functionality requires only basic configurations without significant software upgrades. As email transport security continues to become more automated and seamless technology, port 995 will likely continue serving as a quick path to safely access confidential message contents into the future through secure channels.

Frequently Asked Questions about Port 995

  1. What is port 995 used for?
    Port 995 is used for secure email access using SSL/TLS encryption over protocols like POP3, IMAP, and SMTP.
  2. Is port 995 POP3 or IMAP?
    Port 995 can be used for either POP3 or IMAP protocols. The SSL/TLS encryption is implemented on top of the existing protocols on this port.
  3. How do I enable port 995?
    You enable port 995 by configuring both your email client and email server to use SSL/TLS encryption on top of the standard email protocol ports.
  4. Is port 995 secure?
    Yes, 995 is very secure as all communications are encrypted using industry standard SSL or TLS encryption between client and server.
  5. Can port 995 be blocked by firewall?
    Yes, port 995 can be subject to firewall blocking policies just like any other port. It needs to remain open for secure email functionality.
  6. Is port 995 necessary?
    Port 995 provides encryption so is necessary for securely accessing email messages confidentially. Non-encrypted alternatives like standard POP3 pose privacy risks.
  7. What is the difference between ports 995 and 465?
    Port 995 is receiving email securely while port 465 is for sending email securely after encryption. But both leverage SSL/TLS.
  8. What apps use port 995?
    Common email client apps like Outlook, Thunderbird, Apple Mail, and iPhone Mail as well as email server software like Microsoft Exchange and MDaemon all can use port 995.
  9. Can port 995 be used with webmail?
    Yes, webmail services like Outlook, Yahoo, or Gmail support TLS over port 995 when configuring their online mail clients accessed through web browsers.
  10. How do I open port 995?
    You would open port 995 in a firewall for secure email the same way you open any standard port – by allowing connections inbound/outbound on 995/tcp.
  11. Can I close port 995?
    You can close port 995 but lose the ability to access email securely and encrypted through POP3S/IMAPS if you do.
  12. What port does Outlook use for SSL?
    Outlook commonly uses port 995 for accessing email over POP3/IMAP with SSL or TLS encryption.
  13. Is port 995 POP3 or IMAP?
    Port 995 works with either POP3 or IMAP for downloading email locally. The SSL/TLS applied to port 995 secures whichever protocol is used.
  14. How do I check if port 995 is open?
    To check if TCP port 995 is open run the “telnet server-name 995” command which will telnet to the port and verify availability.
  15. Can I change port 995?
    You typically would not need to change port 995 unless there were conflicts with another service as 995 is standard for POP3S/IMAPS.
  16. Does port 995 use TLS or SSL?
    Port 995 can utilize either SSL or the newer TLS encryption standards for securing the email connection.
  17. What is a POP3 port number?
    Standard non-encrypted POP3 uses port 110. Encrypted POP3S uses port 995 instead for the security benefits TLS provides.
  18. What is an IMAP port number?
    Standard unencrypted IMAP uses port 143. Encrypted IMAPS uses port 995 over a TLS connection.
  19. What is SMTP port number?
    Standard SMTP email submission is on port 25 and encrypted SMTPS uses port 465 which also can employ SSL/TLS.
  20. Can port 995 use SSH?
    No, SSH communication is not supported on port 995. Instead it leverages either SSL or TLS protocols for encrypting email.

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