這些SIG文件也被稱為簽名文件和常常附加到通過電子郵件傳送的消息的結束。基於Microsoft Windows的應用程序,可以用來使用,創建,打開和編輯這些的.sig文件包括高通公司的Eudora電子郵件管理程序,以及更多的流行的電子郵件管理應用程序,如Microsoft Outlook 2010和Microsoft Outlook Express中。高通公司的Eudora電子郵件管理應用也有一個版本與基於Mac系統兼容,並且該版本也可用於創建,使用,打開和編輯這些SIG文件。 SIG文件的內容通常是由有關的電子郵件發件人,比如像之間的商務電子郵件地址和手機號碼等聯繫方式稱呼和姓名,工作職位,公司名加辦公地址和傳真號碼的信息。多數郵件管理應用程序對SIG文件的支持允許用戶創建和實施多個簽名到他們發送的電子郵件,而這可以通過完成創建或編輯簽名功能在這些軟件程序可用。
Eudora is an email base client that works with IMAP, SMTP and POP3 protocols. S/MIME authentication, SSL and in Windows are supported as well for security processes. Qualcomm is the developer of this software since 1991. This has a webmail version that is eudoramail.com but creation of new accounts is not allowed anymore. In order to have Eudora in the users system it must be running with Mac OS X or Windows operating system. The Eudora version 8 is able to run for windows win2000, winxp, win2003, winvista, win7, Linux Kernel, MAC OS X 10.4 and older versions unlike version 7. The system should have the following necessities stated: (windows) 786 MB RAM or 256 MB (win2000), 52 MB HDD and Pentium 233 MHz processor (Macintosh) PowerPC G3, G4 or G5 processor, 200 MB HDD, and 256 MB RAM (Linux) 64 MB RAM, 52 MB HDD and Intel Pentium II and AMD K6 III 233 MHz processor. Eudora has improved some of its features such as the alert sounds, easy to find users interface and platform base on Thunderbird from Mozilla.
Qualcomm, the developer of Eudora (an email client), has continued improving the software that the company cooperated with Mozilla on the project Penelope. This is the also known as the Eudora version 8. The latest version works for MAC operating system (Mac OS X 10.4). If users are operating with 10.5 Leopard, configuring the sound setting of Eudora is a must whether what version of Eudora it is for this OS does not support the audio alerts of the software to avoid complications. It has a customized toolkit dialog that users can resize wherein the recipient tab is present. Filters auto naming of junk and attachments. Also, Eudora has an automatic reply to function and easier searching capabilities of emails. Eudora’s security system can support S/MIME authentication, in windows and SSL. This software can support these following email protocols: SMTP, POP3 and IMAP. To make Eudora work these minimum system requirements should be comply: 256 MB of RAM, 200 MB Hard disk drive space and PowerPC G3, G4, G5 or Intelx86 processor.
Almost all Eudora email client versions can work on computers that run on windows operating systems (a few older versions of Eudora do not have compatibility support for Windows Vista and Windows 7). The minimum system requirements needed to enable users to utilize Eudora are 786MB RAM or win2000 256MB, Pentium 233 MHz processor and 52 MB Hard Disk Drive space. This email client supports POP3, IMAP and SMTP protocols that are secured by SSL and S/MIME authentication every time users access emails using the software. Eudora more organized compare to Microsoft outlook that is bundled in all windows operating system. It has advance features such as drop and drag, easy search, save and restore functions and more. It has various sound alerts to inform users about new emails and comprehensive spam email filtering. The latest version of Eudora has the code name Penelope that is version 8. Qualcomm, Eudora’s developer have merged with Mozilla and created this version that can communicate with Mozilla Thurderbird.
Thunderbird is a free, open source email, newsgroup, news feed and chat (XMPP, IRC, Twitter) client created by the Mozilla Foundation. The project stratagem is modeled after Mozilla Firefox, a project aimed at generating a Web browser. The vanilla version is not a personal information manager, although the Mozilla Lightning extension adds PIM functionality. Additional features, if desired, are often available thru other extensions. It supports UNIX mailbox format (mbox), Mork which is utilized for internal database and SQLite also used for internal database (since version 3). Files that bear the .p7s extension are email messages utilized in email managing programs for sending, receiving or just simply viewing protected emails encrypted with digital signatures. Some of these email management applications include Microsoft Outlook 2010, PostBox and Mozilla Thunderbird. These files contain information as well as the source of the email and whether the email has been edited or modified during transmission, which means users with these email management applications incorporated with P7S support can make sure that the emails they receive are genuine, are originating from trusted senders and are not tampered with, before they open and view the emails.
Outlook Express is an email and news client that is integrated with Internet Explorer versions 4.0 through 6.0. It is also bundled with a number of versions of Microsoft Windows, from Windows 98 to Windows Server 2003, and is available for Windows 3.x, Windows NT 3.51, Windows 95 and Mac OS 9. In Windows Vista, Outlook Express was outdated by Windows Mail, then again by Windows Live Mail as separate software in Windows 7. Microsoft Entourage, sold as part of Microsoft Office for Macintosh, has changed the Macintosh version. Outlook Express is a diverse application from Microsoft Office Outlook. The two programs do not share a common codebase, but do share a common architectural philosophy. The similar names lead many people to incorrectly conclusion that Outlook Express is a stripped-down version of Microsoft Office Outlook. Outlook Express utilizes the Windows Address Book to store contact information and incorporates tightly with it. On Windows XP, it also joins together with Windows Messenger.