Ruby mail gem - search inbox from specific email addresses

Question

Does anybody know how to get mail from an array of email addresses using the 'mail' gem in Ruby? I've seen the thread for getting unread messages like so:

new_messages = Mail.find(keys: ['NOT','SEEN'])

But I cannot find how to get messages from a certain address. I've tried:

new_messages = Mail.find(keys: ['FROM','[email protected]'])

but it doesn't work.

I know section 6.4.4 of the IMAP protocol indicates the different search flags you can use to search for messages, but I can't seem to make it work.

Answer 1

Unfortunately, neither

Mail.find( keys: ['FROM', from_address] )

nor

Mail.find( keys: "FROM #{from_address}" )

worked. What worked, however, is quoting the email address:

Mail.find( keys: "FROM \"#{from_address}\”" )

Luckily, it was just the missing quotes, as the array variant works as well when quoting the email address:

Mail.find( keys: ['FROM', "\"#{from_address}\”"] )

Answer 2

Try this for single email address

Mail.all.select { |mail| mail.from.addresses.include?('[email protected]') }

And for multiple try this

addresses = ['[email protected]', '[email protected]']
Mail.all.select { |mail| (addresses - mail.from.addresses).empty? } 

Also if you want to find just first mail try this

Mail.all.find { |mail| mail.from.addresses.include?('[email protected]') }