We have installed Mageplaza SMTP extension in our magebto 2 store and configured the extension, But We are not able to receive emails. I have to below attached screen short.
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Check if the port declared for smtp is used by any other services? – Raj Mohan R Jul 23 '19 at 12:25
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please share your configuration – Mohit Rane Jul 23 '19 at 13:32
First check ports. I think your hosting/server is blocking port 25, 465, or 587.
Check this url : https://github.com/mageplaza/magento-2-smtp/issues/97
Second : Flush your storage and caches. Run these commands :
php bin/magento c:f
php bin/magento setup:upgrade
php -dmemory=1G bin/magento setup:static-content:deploy -f
My problem solved with these steps in past.