May I suggest that megabyte-sized text files be attached compressed:
$ ls -o config.log* -rw-r--r-- 1 antonio 936144 2013-03-22 18:43 config.log -rw-r--r-- 1 antonio 41109 2013-03-22 18:43 config.log.lzIt took me 5 minutes to download the message, and the mail program locked to death trying to quote the whole thing when I first tried to reply.
Thanks, Antonio.