The e-mail does not reach my inbox

Hi! I’m done with email setup.
I have exim4. The problem arises when I want to collect my mail. Emails from gmail do not arrive, while from other e-mail it is ok.

I checked exim4 / var / log / exim4 / mainlog

2022-09-26 22:53:36 TLS error on connection from mail-yb1-f176.google.com [209.85.219.176] (gnutls_handshake): A disallowed SNI server name has been received.
2022-09-26 22:55:23 exim 4.93 daemon started: pid=18107, -q30m, listening for SMTP on port 25 (IPv4) port 587 (IPv4) and for SMTPS on port 465 (IPv4)
2022-09-26 22:55:23 Start queue run: pid=18113
2022-09-26 22:55:23 End queue run: pid=18113
2022-09-26 22:55:44 TLS error on connection from mail-yw1-f181.google.com [209.85.128.181] (gnutls_handshake): A disallowed SNI server name has been received.
2022-09-26 22:56:38 pid 18107: SIGHUP received: re-exec daemon
2022-09-26 22:56:38 exim 4.93 daemon started: pid=18107, -q30m, listening for SMTP on port 25 (IPv4) port 587 (IPv4) and for SMTPS on port 465 (IPv4)
2022-09-26 22:56:38 Start queue run: pid=20404
2022-09-26 22:56:38 End queue run: pid=20404
2022-09-26 22:56:39 pid 18107: SIGHUP received: re-exec daemon
2022-09-26 22:56:39 exim 4.93 daemon started: pid=18107, -q30m, listening for SMTP on port 25 (IPv4) port 587 (IPv4) and for SMTPS on port 465 (IPv4)
2022-09-26 22:56:39 Start queue run: pid=20898
2022-09-26 22:56:39 End queue run: pid=20898
2022-09-26 22:57:00 TLS error on connection from mail-ua1-f68.google.com [209.85.222.68] (gnutls_handshake): A disallowed SNI server name has been received.

I am using the free Lets Encrypt. There is a generated key, so I don’t know what’s going on.

All e-mails that I send from roundcube to: google, hotmail are sent.

A disallowed SNI server name has been received.
2022-09-26 22:56:38 pid 18107: SIGHUP received: re-exec daemon

the problem is that I don’t have any special characters in the server name. It is subdomain sub.domain.com

I have already found the solution. There was a problem with cloudflare.
subdomains like mail.domain.com webmail.domain.com pop.domain.com smtp.domain.com DNS cannot be proxided.
I leave it here, maybe someday this information will be useful to someone.

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