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Introduction to Email
This chapter provides introductions on email and related technologies. Topics include SMTP, POP3 and IMAP protocols; SSL/TLS secure connections; MUA, MSA, MTA and MDA software agents.
2024-04-06, 112🔥, 0💬

What Is POP3
This section provides a quick introduction on POP (Post Office Protocol 3) for retrieving email messages. A POP3 sample session of retrieving an email message using the 'telnet' command is included.
2024-04-06, 111🔥, 0💬

What Is Email
This section provides a quick introduction on email and how email messages are processed by 4 types of software agents: MUA, MSA, MTA, and MDA.
2024-04-06, 110🔥, 0💬

What Is SMTPS
This section provides a quick introduction on SMTPS (Simple Mail Transfer Protocol Secure) for message transmission. A SMTPS sample session of submitting an email message using the 'openssl s_client' command is included.
2024-04-06, 108🔥, 0💬

Send Message Errors on Thunderbird
This section provides examples of send message errors occurred while sending email messages with Thunderbird.
2024-04-06, 108🔥, 0💬

What Is IMAPS
This section provides a quick introduction on IMAPS (Internet Message Access Protocol Secure) for message retrieval. An IMAPS sample session of retrieving an email message using the 'openssl s_client' command is included.
2024-04-06, 107🔥, 0💬

Install and Configure Postfix on CentOS
This section provides a tutorial example on how to install, configure and run Postfix server on CentOS systems.
2024-04-06, 107🔥, 0💬

Install and Configure Dovecot on CentOS
This section provides a tutorial example on how to install, configure and run Dovecot server on CentOS systems.
2024-04-06, 107🔥, 0💬

Manage Security Certificates on Thunderbird
This section provides a tutorial example on how to access and use Mozilla Thunderbird Certificate Manager, which stores certificates for different application purposes.
2024-04-06, 107🔥, 0💬

Move /var/spool/postfix to New Location
This section provides a tutorial example on how to move /var/spool/postfix to a new location like /data/spool/postfix.
2024-04-06, 106🔥, 0💬

What Is Dovecot
This section provides a quick description on Dovecot, a free and open-source IMAP and POP3 server that allows remote clients to retrieve emails from mailboxes on Linux systems.
2024-04-06, 106🔥, 0💬

Test Dovecot POP3 Server with "telnet" Client
This section provides a tutorial example on how to test Dovecot POP3 server with the 'telnet' client command to send a POP3 request to port 110 on local host. Users can retrieve emails after authenticated with their passwords.
2024-04-06, 106🔥, 0💬

SSL/TLS Secure Connections with Dovecot Server
This chapter provides introductions and tutorial examples about SSL/TLS secure connections with Dovecot server. Topics include testing SSL/TLS connections with 'openssl s_client' commands; replacing the default self-signed server certificate; requesting and installing a CA-signed server certificate.
2024-04-06, 106🔥, 0💬

SSL/TLS Secure Connections with Postfix Server
This chapter provides introductions and tutorial examples about SSL/TLS secure connections with Postfix server. Topics include testing SSL/TLS connections with 'openssl s_client' commands; replacing the default self-signed server certificate; requesting and installing a CA-signed server certificate.
2024-04-06, 106🔥, 0💬

What Is Postfix
This section provides a quick description on Postfix, a free and open-source Mail Transport Agent (MTA) that routes and delivers electronic mail on Linux systems.
2024-04-06, 105🔥, 0💬

SMTP Submission Service on Port 587 in Postfix
This section provides a tutorial example on how to turn on the Postfix dedicate 'SMTP Submission' service on port 587. This allows port 25 to be used for email Reply only.
2024-04-06, 105🔥, 0💬

Keep Deleted Emails on Dovecot
This section provides a tutorial example on how to keep deleted emails on the mail server by using the 'pop3_delete_type' flag and stoping the 'IMAP' service in Dovecot.
2024-04-06, 105🔥, 0💬

Turn on Dovecot Server Logging for Troubleshooting
This section provides a tutorial example on how to turn on how to change logging flags on Dovecot server to record extra debugging messages in log file for troubleshooting issues.
2024-04-06, 105🔥, 0💬

What Is IMAP
This section provides a quick introduction on IMAP (Internet Message Access Protocol) for retrieving email messages. An IMAP sample session of retrieving an email message using the 'telnet' command is included.
2024-04-06, 104🔥, 0💬

"postconf" Command to Manage Postfix Configuration
This section provides a tutorial example on how to 'postconf' command to manage Postfix configuration settings.
2024-04-06, 104🔥, 0💬

References
List of reference materials used in this book.
2024-04-06, 103🔥, 0💬

What Is Mozilla Thunderbird
This section provides a quick introduction of Mozilla Thunderbird, which is email client, or MUA (Mail User Agent), for retrieving and submitting email messages.
2024-04-06, 103🔥, 0💬

Big5 到 Unicode 轉換 - 特殊符號
本章列出了大五碼 (big5) 特殊符號區的字元集和編碼,以及它們所對應的 Unicode 編碼。特殊符號共收錄字母和符號 408 個。
2024-03-29, 174🔥, 2💬

Archived: Downloading and Installing JDK 13 on Mac
This section describes how to download and install JDK on a macOS computer.
2024-03-28, 111🔥, 0💬

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