Enabling TLS Encryption for POP3/IMAPConnections

Secure your POP3 and IMAP email connections with TLS (Transport Layer Security) encryption. Follow these client-specific instructions to protect your email retrieval:

Popular Desktop Email Client Configuration

Microsoft Outlook 365

Go to File > Account Settings > Account Settings
Click your email account and Select Repair
Under Advanced Options, Check “Let me repair my account manually”, then click Repair
Under “Server Port Numbers”, check “This server requires an encrypted connection (SSL/TLS)”
Verify ports: 993 (IMAP with SSL/TLS) or 995 (POP3 with SSL/TLS)
For outgoing server, select the “Outgoing server” tab and under “Encryption Method” choose SSL/TLS and Port 465 or STARTTLS and Port 587

Apple Mail

Open Mail > Preferences > Accounts
Select your account and click the “Advanced” tab
Check “Use TLS/SSL” for both incoming and outgoing servers
Verify correct ports: 993 (IMAP with SSL/TLS) or 995 (POP3 with SSL/TLS)
Click “OK” to save these secure connection settings

Mozilla Thunderbird

Go to Tools > Account Settings > Server Settings
Under “Security Settings,” select “SSL/TLS” for connection security
Verify the port numbers: 993 (IMAP) or 995 (POP3)
For outgoing server, go to “Outgoing Server (SMTP)” and select “SSL/TLS”
Verify SMTP port 465 for SSL/TLS or 587 for STARTTLS

Most modern email clients default to secure settings, but manually configuring TLS for your POP3/IMAP connections ensures your credentials and email content remain encrypted during transmission. These settings provide protection against man-in-the-middle attacks and eavesdropping.

Web-Based Email Service Configuration

Gmail

Sign in to Gmail and click the gear icon > See all settings
Go to “Forwarding and POP/IMAP” tab
Under “IMAP Access” section, select “Enable IMAP”
Choose “Always use SSL when retrieving mail”
Save changes – Gmail automatically enforces TLS for POP3/IMAP connections

Mobile Device Email Configuration

Android Mail App

Open Settings > Accounts > Select your email account
Tap on “Account settings” or “Server settings”
Under “Incoming settings,” select “Security type” as “SSL/TLS”
Verify port numbers: 993 (IMAP) or 995 (POP3)
For “Outgoing settings,” select “Security type” as “SSL/TLS” or “STARTTLS”

iPhone Mail App

Go to Settings > Mail > Accounts > Select your account
Tap “Account” > “Advanced” settings
Under “Incoming Settings,” enable “Use SSL”
Confirm ports: 993 (IMAP) or 995 (POP3)
For outgoing server, go to SMTP settings and enable “Use SSL”