Problem using SMTP mail server - aaPanel - Hosting control panel. One-click LAMP/LEMP.
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Connection could not be established with host
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XF 2.2 - Connection could not be established with host smtp.gmail.com : stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465 | XenForo community
magento2 - Magento 2.3.1 smtp on abstract.php setup - Magento Stack Exchange
XF 2.2 - Connection could not be established with host smtp.gmail.com : stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465 | XenForo community
Connection could not be established with host smtp.gmail.com - Bug reports - PrestaShop Forums
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Could not open socket: stream_socket_client · Issue #250 · mageplaza/magento-2-smtp · GitHub
HELP! Magento 2 SMTP setup Could not open socket: stream_socket_client(): Peer certificate not... - YouTube
magento2 - HELP! Magento 2 SMTP setup Could not open socket: stream_socket_client(): Peer certificate not match - Magento Stack Exchange
connection could not be established with host "ssl://smtp.gmail.com:465" - YouTube
SMTP Microsoft Not Working - osTicket Forum
![Connection could not be established with host smtp.gmail.com [ #0] · Issue #3140 · humhub/humhub · GitHub](https://user-images.githubusercontent.com/5346797/40276460-37100760-5c24-11e8-82ee-c848841c6a98.png "Connection could not be established with host smtp.gmail.com [ #0] · Issue #3140 · humhub/humhub · GitHub")
Connection could not be established with host smtp.gmail.com [ #0] · Issue #3140 · humhub/humhub · GitHub
Could not send the test email. Error: stream_socket_client(): unable to connect to tcp://127.0.0.1:587 (Connection refused) - Installation Issues - Passbolt community forum
connection could not be established with host "mailhog:1025": stream_socket_client(): - YouTube
![resolved] Getting error while trying adding new mail. - osTicket Forum](https://forum.osticket.com/assets/files/2020-10-18/1603005401-23250-smtp-error.jpeg "resolved] Getting error while trying adding new mail. - osTicket Forum")
resolved] Getting error while trying adding new mail. - osTicket Forum
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Oauth2 office 365 smtp problem Could not open socket: stream_socket_client() - osTicket Forum
Oauth2 office 365 smtp problem Could not open socket: stream_socket_client() - osTicket Forum
![php - Swiftmailer: Connection could not be established with host smtp.gmail.com [Connection timed out #110] - Stack Overflow](https://i.stack.imgur.com/s9pvV.png "php - Swiftmailer: Connection could not be established with host smtp.gmail.com [Connection timed out #110] - Stack Overflow")