Yes get dkim and spf configured, and yes you can enable encryption, set

g_ssl_try_out "*"

I don't know if ssl would help with this issue though, dkim and spf are 
the primary means of clarifying that your messages are really from you.

In addition to that check you don't have a spammer sending out spam and 
damaging your reputation

     http://netwinsite.com/surgemail/help/hackers.htm

ChrisP


On 12/02/2017 3:08 a.m., surgemailHIDDEN@etwinsite.com wrote:
>
> I am hearing rumors that a lot of email coming out of my servers is 
> ending up as SPAM at Gmail. (not a problem elsewhere and no I am not 
> an mass email provider).
>
> One third party report indicated that our email was not encrypted? I 
> am not sure of this report as it's third party. But is there a setting 
> for outbound email to attempt ssl/tls connection that I might be missing?
>
> Or are they misinterrupting the signals from Gmail, did they really 
> mean authenicated email. Which would mean missing SPF or DKIM 
> signatures or ???
>
> I don't have enough direct evidence to support either theory right 
> now. Just wondering if someone else has run across this.
>
> Thanks,
> Lyle Giese
> LCR Computer Services, Inc.
>