ubuntu12.04 upgrade: sendmail issue: send-mail: 501 5.5.4 Invalid domain name

[ping]

folks/experts:

previously I had a really handy oneliner that works great for years:
#put this in ~/bin/test.sh
cat "$1" | uuencode "$1" | mail -s "file:$1, from ping's PC"

then I can send any file as email attachment from CLI,  within my 
office, to any one.

but after upgrading to ubuntu12.04LTS, I noticed this tool is broken now:

    ping at 640g-laptop:~$ test.sh temp1.txt songpingemail at gmail.com
1) WARNING: gnome-keyring:: couldn't connect to: 
/tmp/keyring-Gjbkfb/pkcs11: No such file or directory
2) send-mail: 501 5.5.4 Invalid domain name (ping at redroute.com)
3) Can't send mail: sendmail process failed with error code 1

I'm thinking this might involve 2 issues here:

1) this "gnome-keyring" warning I seems saw also on other places, that I 
previously never saw before upgrading.
2) ping at redroute.com is my default company mailbox, I think this is what 
sendmail use as the "sender"'s emailbox
3) I'm doubting some of my files related to sendmail was replaced during 
the upgrading, but I can't remember which files they are...

does anyone experienced the same issue and found any workaround? I 
googled tons of links without seeing a clear clue...
thanks!


regards
ping
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20121010/a67851a1/attachment.html>