Thread View: comp.mail.misc
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Started by Tim Arnold
Thu, 17 Dec 1992 15:08
sendmail probs? advice please
Author: Tim Arnold
Date: Thu, 17 Dec 1992 15:08
Date: Thu, 17 Dec 1992 15:08
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I'm worried about a high volume of mail requests--I am running a Sun Sparc IPX, SunOS 4.1.3, OW 3, unix listserv, gopher and squirrel mail server. I'm using the standard sendmail that came on the machine. My question is: what mta should I be using? If sendmail is a problem, why is it a problem? I will be going public with the machine soon and I want to be prepared for a large volume of mail requests. I'm no expert--thats why I read the net, to find out what the experts say. What I'm worries me is the following info from the net: From the UNIX Email Software Survey FAQ: > > Scenario 3: Connections to other networks (optionally including > SMTP or UUCP), or very high loading. > > Your best bets are MMDF, PP or zmailer. > > You can implement other network interfaces with sendmail, but > not only will you probably have to roll your own, but sendmail > can't cope with high loading very well. Ditto smail 3. > > Another person on the net replies to a similar question from me: > sendmail doesn't break, but if you have the parameters set wrong, it > forks off too many copies at once. the sendmail to use though is the > sendmail5.65c off of uxc.cso.uiuc.edu. don't use the junk that comes > with your sun. Any comments welcome. (got to decide soon: thinking of MMDF, PP, zmail, and now sendmail5.65). --Tim Arnold arnold@stat.ncsu.edu -- ---------------------------------------------------------------------- Tim Arnold Instructional Computing Internet: arnold@stat.ncsu.edu North Carolina State Univ. BITNET : ARNOLD@NCSUSTAT Dept. of Statistics, Raleigh NC 27695
Re: sendmail probs? advice please
Author: David Collier-Brown
Date: Sun, 20 Dec 1992 00:57
Date: Sun, 20 Dec 1992 00:57
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arnold@stat.ncsu.edu (Tim Arnold) writes: |I'm worried about a high volume of mail requests--I am running |a Sun Sparc IPX, SunOS 4.1.3, OW 3, unix listserv, gopher and |squirrel mail server. I'm using the standard sendmail that came |on the machine. |My question is: what mta should I be using? If sendmail is a problem, |why is it a problem? The usual problems are twofold: a) sendfail(8), and b) performance (a) can be achieved by attempting to program in the senamail production language: rumor has it even the author can't remember how it really works (:-)). (b) is related to sendmail's desire to fork instead of queue. It is trivial to stop a small machine (like a NeXT cube, for example) by mailing to a large mailing-list. Sendmail's overload-avoidance is seriously flawed. On the other hand, I can say good things about zmailer: a) its very low load: I had a sun 3/60 acting as the mailhub of the second-largets Canadian university, and it only slowed down when someone uucp'd compresses news to it. I couldn't even tell if mail was running from xload, and faked up a queue-indicator to show me tat it was alive. b) it handles large mailing lsists well c) it's dead easy to install. Large, but dead easy. d) the routing doesn't se rewriting e) the routing code is written in a language designed for unix nerds to program in: it's deliberatly similar to sh. --dave (a happy customer) c-b -- David Collier-Brown, | davecb@CCS.YorkU.CA | lethe!dave 72 Abitibi Ave., | Willowdale, Ontario, | York Postmaster and CANADA. 416-223-8968 | occasional sendfail(8) consultant.
Re: sendmail probs? advice please
Author: David Collier-Brown
Date: Sun, 20 Dec 1992 01:55
Date: Sun, 20 Dec 1992 01:55
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davecb@nexus.yorku.ca (David Collier-Brown) writes: [lots and lots of typos] I gotta remember to use the spell checker: my last several spells went all awry (:-)) --dave -- David Collier-Brown, | davecb@CCS.YorkU.CA | lethe!dave 72 Abitibi Ave., | Willowdale, Ontario, | York Postmaster and CANADA. 416-223-8968 | occasional sendfail(8) consultant.
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