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Why postfix on Ubuntu 20.04 does not send email to external email accounts?
I followed the article (“How To Install and Configure Postfix as a Send-Only SMTP Server” from Digital Ocean knowledge base) line by line several times and the most I got was to send email within internal users. I can’t get postfix sending email to external email accounts, hence my Magento installation won’t send out email do my customer. Any clue what could it be?
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