Error Mail Spool

Hi,

I'm having problems with sending XG backups and alerts via email.

Registration and settings were made for sending alerts and backups, backups are performed daily at 00Hrs.
We noticed that the emails generated from XG are going to the Mail spool and entering the send queue and then failing.

here are some logs:

6503 >>>>>>>>>>>>>>>> Exim pid=26503 (queue-runner) terminating with rc=0 >>>>>>>>>>>>>>>>
20213 child 26503 ended: status=0x0
20213 normal exit, 0
20213 0 queue-runner processes now running
2021-08-02 10:16:51.783 [20214] SMTP connection from [127.0.0.1]:46496 I=[127.0.0.1]:24 (TCP/IP connection count = 1)
2021-08-02 10:16:51.783 [26600] [127.0.0.1] Connection accepted for notification
2021-08-02 10:16:51.785 [26600] [127.0.0.1] F=<suporte@viscardinet.com.br> R=<suporte@viscardinet.com.br> Accepted: SF notification
2021-08-02 10:16:51.949 [26600] 1mAXoJ-0006v2-PL <= suporte@viscardinet.com.br H=localhost (Sophos) [127.0.0.1]:46496 I=[127.0.0.1]:24 P=esmtp L.- S=2690449 M8S=0 RT=0.154s T="Backup for XG230 C24077P2Y2D6Y3D" from <suporte@viscardinet.com.br> for suporte@viscardinet.com.br
MSG Aug 02 10:16:51 [ T_SMTPD-M]: new mail queued, add to inqueue '1mAXoJ-0006v2-PL-D'
2021-08-02 10:16:51.949 [26600] SMTP connection from localhost (Sophos) [127.0.0.1]:46496 I=[127.0.0.1]:24 closed by QUIT
MSG Aug 02 10:16:52 [ T_SMTPD-W]: Mail assigned to 'MS-20200' for scanning '1mAXoJ-0006v2-PL-D'
MSG Aug 02 10:16:52 [ MS-20200]: scan request 1mAXoJ-0006v2-PL-D
MSG Aug 02 10:16:52 [ MS-20200]: S='suporte@viscardinet.com.br' R='suporte@viscardinet.com.br' Subject='Backup for XG230 C24077P2Y2D6Y3D' Size='2690449' Status='Mail has been queued for delivery.' src_ip='127.0.0.1' src_port=46496
MSG Aug 02 10:16:52 [ MS-20200]: Got Notification mail from local system..
MSG Aug 02 10:16:52 [1mAXoJ-0006v2-PL]: [0x9f365380] FROM: suporte@viscardinet.com.br , TO: suporte@viscardinet.com.br
MSG Aug 02 10:16:52 [1mAXoJ-0006v2-PL]: move '54s5NE-zi0sLq-3Y' to forwarder queue
MSG Aug 02 10:16:52 [1mAXoJ-0006v2-PL]: 54s5NE-zi0sLq-3Y <= suporte@viscardinet.com.br R=1mAXoJ-0006v2-PL
MSG Aug 02 10:16:52 [ MS-20200]: processing for 1mAXoJ-0006v2-PL completed
MSG Aug 02 10:16:52 [ T_SMTPD-W]: [SMTPD] mail '1mAXoJ-0006v2-PL-D' processed sucessfully
20213 SIGALRM received
20213 daemon forking for queue-runner
20213 daemon forked for queue-runner: 26656
20213 1 queue-runner process running
26656 postfork: queue-runner
26656 LOG: queue_run MAIN
26656 Start queue run: pid=26656
2021-08-02 10:17:02.416 [26656] Start queue run: pid=26656
26656 queue-runner forking for qrun-delivery
26656 queue-runner forked for qrun-delivery: 26657
26657 postfork: qrun-delivery
26657 locking /sdisk/spool/output//db/retry.lockfile
26657 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
26657 Considering: suporte@viscardinet.com.br
26657 unique = suporte@viscardinet.com.br
26657 LOG: retry_defer MAIN
26657 == suporte@viscardinet.com.br routing defer (-51) DT=0.000s: retry time not reached
2021-08-02 10:17:02.417 [26657] 1mACuH-0006cO-Kf == suporte@viscardinet.com.br routing defer (-51) DT=0.000s: retry time not reached
26657 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
26657 After routing:
26657 Local deliveries:
26657 Remote deliveries:
26657 Failed addresses:
26657 Deferred addresses:
26657 suporte@viscardinet.com.br
26657 >>>>>>>>>>>>>>>> Exim pid=26657 (qrun-delivery) terminating with rc=0 >>>>>>>>>>>>>>>>
26656 queue-runner forking for qrun-delivery
26656 queue-runner forked for qrun-delivery: 26658
26658 postfork: qrun-delivery
26658 locking /sdisk/spool/output//db/retry.lockfile
26658 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
26658 Considering: suporte@viscardinet.com.br
26658 unique = suporte@viscardinet.com.br
26658 LOG: retry_defer MAIN
26658 == suporte@viscardinet.com.br routing defer (-51) DT=0.000s: retry time not reached
2021-08-02 10:17:02.418 [26658] 1mACuW-0006eH-J6 == suporte@viscardinet.com.br routing defer (-51) DT=0.000s: retry time not reached
26658 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

performed the following commands
rm -f retry retry.lockfile

rm -f wait-remote_smtp wait-remote_smtp.lockfile

rm -f wait-static_smtp wait-static_smtp.lockfile

then restart smtpd

service awarrensmtp:start -ds nosync

Delete spool repeat emails:

rm -rf /sdisk/spool/output/db/retry*

after performing the above procedure the same error keeps appearing.