Why do emails forwarded or replied to gain extra blank lines

Question

When replying to, or forward emails that contain original email(s), the original emails frequently gain extra blank lines (Spaces). These extra blank lines grow in number each time the message is include in another email until it becomes so big that the emails become difficult to read.
This happens regardless of whether I created the original emails or not.

Answer 1

Hi guigs2,
Thanks for the reply, however, it does not solve the problem.
I want to include the original message(s) when forwarding or replying. The problem is that the included original message(s) gain extra blank line spaces between paragraphs each time the original message(s) are transmitted. This means the emails automatically grow in length with blank lines. For example: The original message consists of :
''Dear guigs2,''
''Blah blah blah blah blah blah Blah blah blah blah blah blah Blah blah blah blah blah blah.''
''Blah blah blah blah blah blah Blah blah blah blah blah blah Blah blah blah blah blah blah.''
''Kind regards,''
''gwap.''
When this message is replied to, and comes back extra blank links between paragraphs appear. For example:
''Dear gwap.''
''Thank you''
''Kind regards''
''guigs2.''
In a message dated 06/03/2014 17:46:35 GMT Standard Time, [email protected] writes:
''Dear XXX''
''Blah blah blah blah blah blah Blah blah blah blah blah blah Blah blah blah blah blah blah.''
''Blah blah blah blah blah blah Blah blah blah blah blah blah Blah blah blah blah blah blah.''
''Kind regards,''
''gwap.''
Each time the original message(s) is/are sent the number of blank lines increases.
Dear guigs2
My pleasure.
Regards
gwap
In a message dated 0703/2014 17:46:35 GMT Standard Time, [email protected] writes:
Dear gwap.
Thank you
Kind regards
guigs2.
In a message dated 06/03/2014 17:46:35 GMT Standard Time, [email protected] writes:
Dear guigs2
Blah blah blah blah blah blah Blah blah blah blah blah blah Blah blah blah blah blah blah.
Blah blah blah blah blah blah Blah blah blah blah blah blah Blah blah blah blah blah blah.
Kind regards,
gwap.