Hi, I have a problem, which may not really have something to do with the plugin: Contact Form 7, since I also have a shipping problem when sending a newsletter. Sometimes it does not work. When sending the form, only the loader animation turns without the response comes and the mail does not arrive.
When sending a newsletter, the following is always the case: The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
In the error log files there are to these plugins and also no other entries.
The provider thinks it is at WordPress.
The working memory is set to: 250 MB with PHP version 7.0.
Can anyone tell me what it could be?
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