Could not open socket
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Been using your plugin forever to get contact form email submissions and system emails. Suddenly all emails are not being sent. I asked my host about settings and all is the same. Not sure what else I can tweak. Always used SMTP and it was working fine. My IP changed because host moved me to a server with PHP 7.4x but email server did not change. Today switching it to PHP mail function allowed test email to go through. Never used that before. With SMTP I got two different messages, see below. My host is not helping. Shall I leave it on PHP mail function and why did it stop working?
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Could not open socketYour host may have installed a firewall between you and the server. Ask them to open the ports.
You may have tried to (incorrectly) use SSL over port 587. Check your encryption and port settings.?AND…
‘https://xxxx.com’ appears to be a DNS hostname but cannot match against hostname schema for TLD ‘com’, ‘https://xxxx.com’ does not appear to be a valid URI hostname, ‘https://xxxx.com’ does not appear to be a valid local network name
Your Web Host provider may have installed a firewall between you and the server.
Contact the admin of the server and ask if they allow outgoing communication on port 25,465,587.
It seems like they are blocking certain traffic. Ask them to open the ports.
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