CommuniGate Pro Mail Server
One of the nicer features about CGP is the ability to customize. You decide which services you want to provide or allow, based on per domain or per user. You could allow only secure connections, or restrict connections via IP or domain. And the web interface, including the web actions dictated by each link, may be customized to suit your taste. The default Web Mail configuration is acceptable for most intranets, but ISPs and free e-mail sites would certainly want to add their own layouts. This seems to be easily accomplished, based on feedback I've seen on the CGP mailing list, including the use of custom CGI scripts, or choosing from ones available on the Stalker web site. Future upgrades will leave your changes intact, but use common sense; always make a backup.
It's inevitable—everyone has seen it. Most of us have one somewhere or another. Some people love it, some hate it—web mail is here to stay, and can make life much easier for those on the road or otherwise remotely accessing e-mail. The default web mail configuration is usable, but has some quirks and annoyances. To be fair here, so do Yahoo, Hotmail and the like. The web interface can be customized almost to your heart's content, and it does provide some nice features. I have not done any customization, but several commercial customers on the CGP list seem to have had success with it. Therefore, any comments here are about the default interface only.
Users are able to configure their web-mail settings to include sort order, number of messages to display per screen, which mailboxes to display, signature and reply formats and too many other things to cover here, but suffice to say it's quite nice. Users also have the option of polling external mailboxes via POP3, and as an added bonus, can use the web interface to upload and maintain their personal web site. A user may also define his own rules, using the same options as the server-wide rules—an option any user subscribed to mailing lists will definitely appreciate.
All is not perfection, however; a few annoyances remain, most notably the default “Delete” and “Next Unread” operations. Upon deleting a viewed message, a user is brought back to the Mailbox, rather than the more usual behavior of moving on to the next unread message without requiring user intervention. The “Next Unread” seems to ignore any sort order a user has specified and moves on to the next unread message in its mail file rather than using the sort order for displaying messages. This may sound minor, but it can be quite frustrating with a folder containing a lot of unread messages. The Delete behavior can (thankfully) be fixed easily by making a minor change to the HTML.
The last remaining quirk relates to the way some mail clients send web pages as attachments. Under some circumstances, the user is confronted with a message about “Embedded Web Pages” and his browser being unable to display in-line frames. So far, Netscape Messenger and Outlook Express produce the same result. When this happens, the user must click on a link to launch another browser window in order to view it. Hopefully, this will be fixed shortly.
I've used everything from Pine to Netscape and Outlook to retrieve mail from CGP and have yet to run into a problem using these clients via IMAP or POP3. Mailing lists are easy to set up, and also allow accessing them via the Web. They can be configured to automatically digest and support the typical features under traditional list servers such as majordomo, allowing for both moderated and unmoderated, public and private lists. The help files, list notifications and bounce processing are easily configured and customizable.
easy installation & administration
many tools and features
thorough administration package
mail transport agent and web e-mail service
retrieves POP3 or IMAP
next unread operation is disorganized
delete operation exits folder
web page attachments are problematic
Day-to-day administration is minimal, since the log rotation and most tasks are handled for you (once configured). A note of caution is in order, however; the logs can get quite large if all data is being logged, so after determining the server is in working order, logging policies should probably be altered. A “Monitors” section of the Admin interface allows you to watch all active connections via the Web and other protocols and view any logs, including filtered logging by content or time. One minor complaint is the log is displayed in reverse order with the most recent events displayed at the bottom of the page, which may be off the screen. A nice addition would be to send a notification if more connections are being requested than are configured, to enable system administrators to determine more easily when they may need to allow more connections or upgrade hardware. Aside from that, most administrators should rarely need to use the monitors section as the system practically runs itself, but it's good to know it's there.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide