Version:           4.7.2 (using Devel) 
OS:                Linux

Seen in kmail-4.7.4:

There is a configuration setting for the maximum number of recipients in a mail
reply: Email editor > General > Maximum number of recipients.
It was introduced in
https://projects.kde.org/projects/kde/kdepim/repository/revisions/f3476527e4f4c0e269590bf5108cdce211b9c2c7
as a fix to https://bugs.kde.org/show_bug.cgi?id=216351

The problem is that the default value of this maximum number is 1.
So, when I "reply to all" to a mail with 1 To and 2 CC recipients, I get a
dialog "Truncating recipients list to 1 of 2 entries." And no hint where this
problem comes from.

Suggestion 1: Set the default value to 100.
This would make the problem disappear with normal (not huge) recipient lists.

Suggestion 2: Add to the error message (in messagecomposer/recipientseditor.cpp)
a hint where to find the configuration setting for the limit.


Reproducible: Always

Steps to Reproduce:
Pick a mail with 1 To and 2 CCs. Do "Reply to all...".

Actual Results:  
A dialog "Truncating recipients list to 1 of 2 entries." appears,
and some of the expected recipients have been omitted.

Expected Results:  
All Tos and all CCs (except myself) should be listed as recipients.

Related bugs:
https://bugs.kde.org/show_bug.cgi?id=216351
https://bugs.kde.org/show_bug.cgi?id=287367