GroupWise: Distribution Lists


What is the maximum entries allowed in the cc: field i.e. distribution list for GroupWise?



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Maximum number of entries? I think its version-dependent. Version of the CLIENT, mainly.

What version of the client?
And is this a System Distribution List, stored in the System Address Book, or is this a Personal Distribution List?
jhiebAuthor Commented:
Hi PsiCop,

Good questions. Let's look at version 6.5.x and the latest build of 5.x. Unless something in the middle drastically changed these two versions should be enough. I'm not too concerned about 7.x unless you know the answer.

I'm more concerned about the Personal Distribution list. If someone started an email and added users to the to: or cc: section, how many entries can they enter?

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Interesting question.

I've no idea what the limits were in v5.x. To get an answer, you'd need to either get a v5.x client and test it by hand, or track down a v5.x developer who knows the code. Or stumble across a TID that mentions it, similar to, which sort of obliquely touches on this. Whatever it was, I suspect it was a lot less than in v6.x.

I'm not finding any limits mentioned in the v6.5 documentation. The Address Book online help doesn't say, nor does the Administration Guide or the Client Guide. I would have thought the Import/Export docs would have mentioned a limit, but they don't. I guess, in theory, you can Import a .NAB file of unlimited size.

What's the context of the question? That is, what's prompted you to ask it?

jhiebAuthor Commented:
I help people migrate email and email systems. Some systems appear to have distribution list limits. It's a hit and miss scenario sometimes, and I thought I would finally settle the question on what the limits are on various email systems. Knowing what the limits are will offset some problems I run into.
Yeah, I can't find any documentation that talks about an absolute limit to a distribution list.

By the way, a distribution list in GroupWise is a public list, and the recipients can be any type - to, cc or bc.  A private "distribution list" is actually called a "personal group."  Again, the recipients can be to, cc or bc.

The only thing I've seen as far as a limit goes is a TID talking about having problems with people doing a CTRL-A in the system address book and sending an email message to thousands of users at once, causing GWIA to be processing hundreds of messages at a crack, slowing down processing of outbound mail, and the GroupWise Web Access or IMAP clients having troubles opening messages with over 10,000 entries in the "TO:" field.

There are TIDs from 1993 talking about absolute space limits on those fields, like 6K or some such - but that would probably be GroupWise 4, and ancient history.

Does that tell you something about the scalability of GroupWise vs the others?

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By the way, the TID talking about the problems opening messages with over 10,000 entries in the "to" field mentions that it is specifically a "to" field problem and suggest that using cc: or bc: would make a difference, by directing users away from using CTRL-A and toward building and using distribution lists and personal groups, which would enable such mass-mailings to be sent using cc: and bc:.

It also mentions that having the "to" field that massive bloats even a brief text-only message to multi-megabyte size.

Sounds to me like there isn't a hard limit in GroupWise, but there's a common-sense limit somewhere along the line ;)
>  If someone started an email and added users to the to: or cc: section, how many entries can they enter?

I think the limiting factor is going to be the server's ability to process the messages, not the number that can fit in the field. I have a reasonably powerful server, but limited storage and bandwidth. My people have reported having problems with dropped messages when sending to as few as 500 recipients. They are able to get around that by dividing the recipient lists into groups of around a hundred or so. Just down the road a ways is a large organization that maintains multiple lists with thousands of recipients with no problem. The difference is the bandwidth and hardware, not the software. Also, it makes a big difference who the recipients are. Internet email is more likely to cause a problem than internal recipients.
Yeah, I saw that 1993 TID talking about the 6K limit in address fields of message composition windows. Ancient history is pretty accurate.

billmercer, I'd respond "yes and no" to the suggestion that the issue is wholly server-based. The client still needs to resolve all the addresses involved, and expand any Groups/DLs prior to submitting the message to the POA. A huge group can, conceivably, run the client out of resources. Perhaps not due to a hard limit (like in the 1993 TID that ShineOn and I saw), but if nothing else, due to a local OS limit.
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