Can I send emails from my one site to another

[LookyLou]

So I have email subscribe boxes on my bogs, here is an idea but not too sure if it is alright to do, can I send emails I have from my one site to users on another of my site?

[fetishnews]

If they have opted in why would it be an issue?

[blingman]

I do and never had anyone complain.

[PornPete]

If they have opted in why would it be an issue?

What I say

[tacnet]

Best to run your domains / ip through https://mxtoolbox.com/blacklists.aspx to check if they get blacklisted

Most users dont bother to complain these days, they just stick it straight to their spam box

[greatpornlinks]

If they have opted in why would it be an issue?

Sounds right to me