Handle server side throttling

General informations

• system/distribution (with version): Debian Buster
• offlineimap version (offlineimap -V): offlineimap v7.2.3
• Python version: v2.7.16
• server name or domain: Amazon WorkMail
• CLI options: nothing special

Configuration file offlineimaprc

[Repository WorkMail-Remote]
type = IMAP
remotehost = imap.mail.eu-west-1.awsapps.com
remoteuser = REDACTED
readonly = true
maxconnections = 4
ssl = true
sslcacertfile = /etc/ssl/certs/ca-certificates.crt

Logs, error

Thread 'Copy message from WorkMail-Remote:Vault/2007' terminated with exception:
Traceback (most recent call last):
  File "/usr/share/offlineimap/offlineimap/threadutil.py", line 160, in run
    Thread.run(self)
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/share/offlineimap/offlineimap/folder/Base.py", line 839, in copymessageto
    message = self.getmessage(uid)
  File "/usr/share/offlineimap/offlineimap/folder/IMAP.py", line 324, in getmessage
    data = self._fetch_from_imap(str(uid), self.retrycount)
  File "/usr/share/offlineimap/offlineimap/folder/IMAP.py", line 784, in _fetch_from_imap
    imapobj.select(self.getfullIMAPname(), readonly=True)
  File "/usr/share/offlineimap/offlineimap/imaplibutil.py", line 70, in select
    raise OfflineImapError(errstr, severity)
OfflineImapError: Error SELECTing mailbox 'Vault/2007', server reply:
('NO', ['EXAMINE Too many actions per second, please back off (0.210 + 0.000 + 0.209 secs).'])

Steps to reproduce the error

• Run a sync with the above server

---

I've scanned the man back and forth and there doesn't seem to be an option to add a "minimum delay" between commands.

I'm not an expert of IMAP protocol, is this a valid requirement or is the server supposed to slow down / keep operations on hold on its side?

Thanks