You may also want to make sure that you're configured SPF for your domain... I 
know that Google can be suspicious of new or small domains unless SPF (or even 
DKIM) is implemented. 

SPF is easy to implement. You just need to put a TXT entry into DNS. 

Timothy

Sent from my iPhone

> On Sep 18, 2016, at 17:19, Mark Sapiro <m...@msapiro.net> wrote:
> 
>> On 09/17/2016 11:05 PM, Eko Budiharto wrote:
>> dear all,
>> I have a list using mailman. It cannot send mails to yahoo, hotmail and 
>> gmail. I check all setting in the mailman, but I still cannot find the 
>> problem yet. Please help me if someone who ever experience like this.
> 
> 
> It's hard to tell without more information such as bounce messages or
> log messages, but this could be a DMARC issue. See
> <https://wiki.list.org/x/17891458> and <https://wiki.list.org/DEV/DMARC>.
> 
> It is also possible your server is on one or more blacklists. Check at,
> e.g., <http://mxtoolbox.com/blacklists.aspx>
> 
> Also see <https://wiki.list.org/x/4030690>.
> 
> -- 
> Mark Sapiro <m...@msapiro.net>        The highway is for gamblers,
> San Francisco Bay Area, California    better use your sense - B. Dylan
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