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I have new installation:
Apache/2.4.29 (Win32) OpenSSL/1.0.2n
Windows Server 2008 R2
I set up email@example.com email and enable Sending Email via SMTP. When I go to Admin Panel--Emails--Diagnostic and try to send "Test Outgoing Email" on firstname.lastname@example.org, everything is OK.
But when I try to send the same email to external email address, then I always get "Loading ..." animation and then this error:
This page isn’t working
220.127.116.11 is currently unable to handle this request.
HTTP ERROR 500
But after some minutes I receive this test email message to the external mail address.
How can I repair that issue? What can I do?
It is not acceptable that I have to wait for mail arrival for some minutes because I would like to get it at the moment.