[Koha] More problems with Google security upgrade

We're using our Koha server as the SMTP server, so we're not having the same problems as I've been reading from others.  Our problem is we started having trouble sending to Gmail accounts. This started around the time people started posting about their problems sending from Gmail accounts. Does anyone know of any changes we'd need to make to our settings to get Gmail to accept notices from Koha? -- *Tim McMahon* West Liberty Public Library