This 99% of the time is a hosting problem. Usually a slow server or database, a dns problem and many others all related to hosting. Sometimes it is ...

It is really simple. Some plugin is sending data too early. Some misbehaving plugin.

This is too much information posted and nobody is gonna read it. Time is limited for everyone. All in all: 1. wpForo doesn't handle email. Not at ...

What "problematic" exactly means? Let's see an example pasted here: This is pasted at first as text and then automatically turned into a hyperl...

This is NOT a warning actually but a major error. And i doubt it comes from wpForo. Do you have DEBUG to a LOG enabled ? If so do you see any errors...

You can use whatever you want for email (smtp). wpForo doesn't handle email sending, Wordpress core does.

!-- Performance optimized by W3 Total Cache. Learn more: Page Caching using disk: enhanced Minified using disk Database Caching 1/301 queries in 0...

Not sure i understand the questions about Justwrite. Justwrite is theme like all the others and wpForo a plugin like the others. You can install a...

Not possible at the moment.

I don't see any search option for the FORUMS. Search of WP and Search of the forums are different. Totally.

Fixed.

And also i see "<script type="text/javascript">" a stray start tag ???

Thanks for the update. Early to tell about the rest BUT for optimizations the work you did is great. Site 1: 1.7 with Fast Velocity optimizer ...

How is this WP+forum installed and tested? Locally ? In a hosting plan ? It is not very clear what the problem is, keep in mind that all email is ...

While this is a Wordpress issue, since Wordpress core handles all that, here is what can help you in this: