[Cialug] Logwatch not sending email to my Gmail account

[Rob Cook]

Recently, in the last week, I've stopped getting logwatch emails from my
home machines to my gmail account, I'm still getting denyhost notification
emails (damn chinese bots!) and I can send an email to my gmail account
using  *mail -s "Testing" rdjcook at gmail.com <rdjcook at gmail.com> *but
logwatch gives the following:

*Aug 16 08:27:17 backup postfix/pickup[7688]: D581D400EB: uid=0 from=<root>*
*Aug 16 08:27:17 backup postfix/cleanup[8480]: D581D400EB:
message-id=<20140816132717.D581D400EB at backup.cookfam.lan>*
*Aug 16 08:27:17 backup postfix/qmgr[7673]: D581D400EB:
from=<root at backup.cookfam.lan>, size=2265, nrcpt=1 (queue active)*
*Aug 16 08:27:18 backup postfix/smtp[8482]: connect to
gmail-smtp-in.l.google.com
<http://gmail-smtp-in.l.google.com>[2607:f8b0:4001:c05::1a]:25: Network is
unreachable*
*Aug 16 08:27:18 backup postfix/smtp[8482]: D581D400EB:
to=<rdjcook at gmail.com <rdjcook at gmail.com>>,
relay=gmail-smtp-in.l.google.com
<http://gmail-smtp-in.l.google.com>[74.125.193.27]:25, delay=1.8,
delays=0.96/0.02/0.45/0.34, dsn=2.0.0, status=sent (250 2.0.0 OK 1408195625
dt9si16457433icc.99 - gsmtp)*
*Aug 16 08:27:18 backup postfix/qmgr[7673]: D581D400EB: removed*

Specifically the 'Network is unreachable' is the obvious issue but I'm
stumped as to why I can email without problem but logwatch/postfix is
unable to do so. I have not made any changes that I know of, this seems to
have happened of it's own accord.

If there are conf files I can post please let me know,

Thanks for the help,
Rob