mailman - yahoo, gmail, hotmail issues

[cybershark]

I'm using mailman and obviously have a mailing list.

The list works fine, but my problem is none of the emails I'm sending
are received by anyone on my list who has a yahoo, gmail, or hotmail address.

[JCsDesignz]

Silly question but have the recipients checked their Spam boxes ?

I use mailman and havent come across this problem other than the mail ending up in the spam box

[cybershark]

Yes. I added my yahoo and gmail accounts in to see.
Nothing, not even in the spam boxes.