About two days ago, i installed an extension, then have removed it. The people who made the extension say, their extension hasn't caused the problem but our customers have been contacting us to say that the email they got for their order is not theirs. when i looked i noticed that there is a random email put in all the transnational emails.
i upgraded to magento 18.104.22.168 but it is still happening. I removed all the extension files that I have installed to no avail.
i had custom email templates, now i put everything back to the default templates and that also didn't help.
I appreciate any help.