Error on aliases expansion using :include: line_length_limit related

2 msg	Fwd: User unknown... when trying to subscribe f...

Error on aliases expansion using :include: line...
\ casfre (27 Mar 2008)
. \ (Wietse Venema) (27 Mar 2008)

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Subject:	Error on aliases expansion using :include: line_length_limit related
Group:	Postfix-users
From:	casfre
Date:	27 Mar 2008

Hi,

I am using postfix 2.4.6. My users are in /etc/passwd.

In my /etc/postfix/aliases I have some lines like this:

somegroup: :include:/etc/postfix/somegroup.txt

In /etc/postfix/somegroup.txt, according to aliases manual, I
have a line like this: ( "..." means a lot of users, using the same
syntax )

user1, user2, userbla, user3, user4, ... , userbignum

(Just for clarify, I have notify_classes = resource, software,
bounce, 2bounce)

Today, I received a message at postmaster, containing:

<userbig> (expanded from <somegroup>):
unknown user: "userbig"

<num> (expanded from
<somegroup>): unknown user: "num"

Because I noticed that "g" from "userbignum" is the byte number
2048 in the line, I looked at the manuals.
According to local.8 manual, there is a "line_length_limit", that
is 2048 per default.
Well, at this time, I think I have just one option: rise
line_length_limit. I did it, to 3072, for awhile.

But, I would like to know:

-What are the consequences ( I know it will use more memory, right?).
-Is this behaviour (the error message) correct, I mean, expected?
-Is there another way to solve this? (A mailing list manager is at
my TODO list).
-Is acceptable to build "somegroup.txt" putting a username per
line, without ","? I made a test, and it worked, but, because the
information about the correct syntax, in aliases.8 manual, I decided
to ask.

Thank you for your attention.

Regards,

Cássio