I haven't read the mail background for a long time, but I don't know that I have stopped sending letters for several months. No wonder I feel much quieter recently. Maybe I'm too lazy and haven't found any problems for so long. Fortunately, it is just a small blog, and few people are watching it, so it has little impact.
Today, I finally had some time to look at it and found that it was a SOCKET error, but my virtual host could not solve it.
Continue Google, find a new version, download and try it, and finally solve the problem.
But it's a bit confusing. I set the queue to send, and then visit the URL sent regularly.
The problem can finally be solved by using the scheduled task function of the virtual host and setting a visit every few minutes.
It is the first time that I found that this scheduled task on the host is a very good function.
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