Long answer FTP+POP3, what is the reason?

Good day mavens. There are VPS. Job sites are spotless. However, when logging in via FTP Manager on the server there is a delay for 3-5 seconds. Same with receiving/sending mails through MS Outlook. With other hosters this is not a problem. From another IP everything is also works instantly. What could be the problem?
April 7th 20 at 10:59
1 answer
April 7th 20 at 11:01
logs , tcpdump, wireshark

someone is waiting for the certificate, most likely, but maybe the route

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