Tried sending an e-mail a few times and am getting this error:

>11/27/2023, 14:45:06: SEND  - Certificate S/N: 0C20E581DFEBEB1AC48CCE5C1B52AE44, algorithm: RSA (2048 bits), issued from 10/24/2023 to 4/17/2024 11:59:59 PM, for 23 host(s): smtp.mail.yahoo.com, smtp.mail.yahoo.com.ar, smtp.mail.yahoo.com.au, smtp.mail.yahoo.com.br, smtp.mail.yahoo.com.cn, smtp.mail.yahoo.com.hk, smtp.mail.yahoo.com.my, smtp.mail.yahoo.com.ph, smtp.mail.yahoo.com.sg, smtp.mail.yahoo.com.tw, smtp.mail.yahoo.com.vn, smtp.mail.yahoo.co.id, smtp.mail.yahoo.co.in, smtp.mail.yahoo.co.kr, smtp.mail.yahoo.co.th, smtp.mail.yahoo.co.uk, smtp.mail.yahoo.ca, smtp.mail.yahoo.cn, smtp.mail.yahoo.de, smtp.mail.yahoo.fr, smtp.mail.yahoo.it, smtp.y7mail.com, smtp.correo.yahoo.es.
>11/27/2023, 14:45:06: SEND  - Owner: "US", "California", "Sunnyvale", "Oath Holdings Inc.", "smtp.mail.yahoo.com".
>11/27/2023, 14:45:06: SEND  - Issuer: "US", "DigiCert Inc", "www.digicert.com";, "DigiCert SHA2 High Assurance Server CA". Valid from 10/22/2013 12:00:00 PM to 10/22/2028 12:00:00 PM.
>11/27/2023, 14:45:06: SEND  - Root: "US", "DigiCert Inc", "www.digicert.com";, "DigiCert High Assurance EV Root CA". Valid from 11/10/2006 to 11/10/2031.
11/27/2023, 14:45:06: SEND  - TLS handshake complete
11/27/2023, 14:45:26: SEND  - connected to SMTP server

!11/27/2023, 14:45:46: SEND  - Connection to host broken (last commands sent were: "EHLO cpeac4ca55afb77-cmac4ca55afb75.cpe.net.cable.rogers.com", "HELO cpeac4ca55afb77-cmac4ca55afb75.cpe.net.cable.rogers.com")
11/27/2023, 14:45:46: SEND  - connection finished - 0 message(s) sent


Should I be concerned?
What would cause this error?