Is it OK to fix typos in quotes/old mails?

[Jens Seidel <tux-master@web.de>]

Hi,

the source of www.debian.org contains many quotes, IRC logs and copies of
mails such as english/News/weekly/1999/18/mail.wml.

Now I want to know: Is it OK to fix typos in these documents?

I think yes it is, since these documents mainly exists to adapt
formating and style to www.debian.org and to allow translations.

Is it necessary to ask each of the individual authors first? What
happens if the mail is signed (we can remove signatures)?

Please note that the location of original mails is the mailing list
archive not w.d.o.

Jens