Autosupport not being sent due to firewall blocking SMTP access

• AutoSupport is enabled but fails to send.
• Display Connection reset by peer in notifyd log.

(emittime: 6/8/2022 02:47:53) (message: STATE: SENDPROTOCONNECT => PROTOCONNECT handle 0x809cd1008; line 1550 (connection #0))
(emittime: 6/8/2022 02:47:53) (message: 220 RestrictedRelay36EX1901.mailserver.com Microsoft ESMTP MAIL Service ready at Tue, 7 Jun 2022 12:47:53 -0600)
(emittime: 6/8/2022 02:47:53) (message: EHLO shcfs01-1b)
(emittime: 6/8/2022 02:47:53) (message: SMTP 0x809c4ff30 state change from SERVERGREET to EHLO)
(emittime: 6/8/2022 02:47:53) (message: 250-RestrictedRelay36EX1901.mailserver.com Hello [Mail_Server_IP])
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 141 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-SIZE 36700160)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 122 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-PIPELINING)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 106 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-DSN)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 97 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-ENHANCEDSTATUSCODES)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 72 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-STARTTLS)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 58 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-8BITMIME)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 44 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-BINARYMIME)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 28 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250-CHUNKING)
(emittime: 6/8/2022 02:47:53) (message: Curl_pp_readresp_ 14 bytes of trailing server response left)
(emittime: 6/8/2022 02:47:53) (message: 250 SMTPUTF8)
(emittime: 6/8/2022 02:47:53) (message: SMTP 0x809c4ff30 state change from EHLO to STOP)
(emittime: 6/8/2022 02:47:53) (message: STATE: PROTOCONNECT => DO handle 0x809cd1008; line 1569 (connection #0))
(emittime: 6/8/2022 02:47:53) (message: DO phase starts)
(emittime: 6/8/2022 02:47:53) (message: MAIL FROM:shcfs01-1a@mailserver.com)
(emittime: 6/8/2022 02:47:53) (message: SMTP 0x809c4ff30 state change from STOP to MAIL)
(emittime: 6/8/2022 02:47:53) (message: STATE: DO => DOING handle 0x809cd1008; line 1611 (connection #0))
(emittime: 6/8/2022 02:48:36) (message: Recv failure: Connection reset by peer)
(emittime: 6/8/2022 02:48:36) (message: DO phase failed)