find email addresses on website

I am searching 20 websites for email addresses to ask manufacturer to compare their product to a product I already have

I may add more email addresses

I find I was clicking on the website looking for 'contact us'
and if there was an input textbox, I would click 'about us'

Is there a google search I could do instead @
most websites have the the domain name as email (but some have yahoo, aol)
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Loganathan NatarajanLAMP DeveloperCommented:
do you want to verify the email address exist on the domain or not?
rgb192Author Commented:
do you want to verify the email address exist on the domain or not?
I just want to find email addresses so I can email the website admin or someone on the website to ask a question.
I am not sure  meaning of
Loganathan NatarajanLAMP DeveloperCommented:
I don't understand this?

Is there a google search I could do instead @

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rgb192Author Commented:
searching for 'search term' 'search term'

email addresses have @ symbol.
RobOwner (Aidellio)Commented:
i mean you can search google with: @[domain] site:[domain]

The 2nd link is their contact details
EirmanChief Operations ManagerCommented:
Perhaps you need an Email Scraper program such as one of these ...

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rgb192Author Commented:
thank you for software
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