Errors when trying to perform a backup using duplicity webdav and gmail

[pleirb]

How's everybody?
I'm back after quite a while. I'm pretty insistent, and I want to use everything this fantastic tool has to offer. Now I'm at the stage of being able to back up to the cloud. I am using a webdav provided by Pcloud for testing. I have answered all the copier questions.
The format backup URL I am using is: webdav://mail@domain.com.uy:password@pcloud.com/path/to/backup
And the email for the reports is a Google account with server smtp.gmail.com and port 587
Everything seems correct, I run docker-compose -f prod.yaml up -d and odoo works fine via Traefik2.
But when running: docker compose exec backup /etc/periodic/daily/jobrunner as the documentation suggests for the first backup, I get this error:

INFO:jobrunner:2024-03-11 20:25:52.073536 UTC - Running daily jobs
INFO:jobrunner:Running job 200: `set -euo pipefail; psql -0Atd postgres -c "SELECT datname FROM pg_database WHERE NOT datistemplate AND datname != 'postgres'" | grep --null-data -E "^prod" | grep --null-data --invert-match -E "$^" | xargs -0tI DB pg_dump --dbname DB --no-owner --no-privileges --file "/mnt/backup/src/DB.sql"`
INFO:jobrunner:
===================================
Job 200: `set -euo pipefail; psql -0Atd postgres -c "SELECT datname FROM pg_database WHERE NOT datistemplate AND datname != 'postgres'" | grep --null-data -E "^prod" | grep --null-data --invert-match -E "$^" | xargs -0tI DB pg_dump --dbname DB --no-owner --no-privileges --file "/mnt/backup/src/DB.sql"`
Started: 2024-03-11 17:25:52.073808
Finished: 2024-03-11 17:25:52.303610
Success: True

pg_dump --dbname prod --no-owner --no-privileges --file /mnt/backup/src/prod.sql

INFO:jobrunner:Running job 300: `backup`
ERROR:jobrunner:Failed!
Traceback (most recent call last):
  File "/etc/periodic/daily/jobrunner", line 58, in <module>
    result = check_output(expanded_command, stderr=STDOUT, shell=True, text=True)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/subprocess.py", line 466, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'backup' returned non-zero exit status 1.
ERROR:jobrunner:
===================================
Job 300: `backup`
Started: 2024-03-11 17:25:52.303716
Finished: 2024-03-11 17:27:55.775696
Success: False

Command 'backup' returned non-zero exit status 1.
+ exec dup /mnt/backup/src webdav://mail@domain.com.uy:password@pcloud.com/path/to/backup
Attempt of list Nr. 1 failed. BackendException: Bad status code 501 reason Method Not Implemented.
Attempt of list Nr. 2 failed. BackendException: Bad status code 501 reason Method Not Implemented.
Attempt of list Nr. 3 failed. BackendException: Bad status code 501 reason Method Not Implemented.
Attempt of list Nr. 4 failed. BackendException: Bad status code 501 reason Method Not Implemented.
Giving up after 5 attempts. BackendException: Bad status code 501 reason Method Not Implemented.
Single-destination mode enabled
Executing: duplicity  --metadata-sync-mode partial /mnt/backup/src webdav://mail@domain.com.uy:password@pcloud.com/path/to/backup
Traceback (most recent call last):
  File "/usr/local/bin/dup", line 125, in <module>
    subprocess.check_call(command, shell=True)
  File "/usr/local/lib/python3.11/subprocess.py", line 413, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command 'duplicity  --metadata-sync-mode partial /mnt/backup/src webdav://mail@domain.com.uy:password@pcloud.com/path/to/backup' returned non-zero exit status 50.

INFO:jobrunner:Sending email report
ERROR:jobrunner:Failed sending email
Traceback (most recent call last):
  File "/etc/periodic/daily/jobrunner", line 88, in <module>
    smtp = smtplib.SMTP(smtp_host, smtp_port)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/smtplib.py", line 255, in __init__
    (code, msg) = self.connect(host, port)
                  ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/smtplib.py", line 341, in connect
    self.sock = self._get_socket(host, port, self.timeout)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/smtplib.py", line 312, in _get_socket
    return socket.create_connection((host, port), timeout,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/socket.py", line 827, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/socket.py", line 962, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
socket.gaierror: [Errno -3] Try again
At least one job failed

From already, thank you very much!

[pleirb]

webdav://mail@domain.com.uy:password@pcloud.com/path/to/backup

I found my mistakes. The webdav failure was due to the fact that I composed the URL incorrectly, I had put:

webdav://mail@domain.com.uy:password@pcloud.com/path/to/backup

And it is:

webdavs://mail@domain.com.uy:password@webdav.pcloud.com/path/to/backup

Regarding the email problem, I had not put anything in the question about the canonical domain