Purpose:
The purpose of this document is to detail the best practices and recommendations from iMail when
ingesting data into the iMail Cloud Mail and iMail SecureArchive offerings.
Data Recommendations
Often you are left with the decision about which platform to ingest your data into. Based on the source
of the data, we recommend the following below.
Mailbox data
If your data is coming out of a mailbox such as Office365, Gmail or Exchange it is recommended this
data be ingested into a Cloud Mail mailbox as folder structure will be retained.
Mail from this source can also ingested into the Archive servers but there is no guarantee the data in
the mailboxes is in its original untampered format. It is also important to note that should you choose
to ingest into the archive then folder structure will be lost.
Archive data
If your data is coming from an archive solution such as Mimecast, Symantec or Proofpoint it is
recommended this data be ingested into SecureArchive to retain the original format and meta data of
the untampered with mails.
It is not recommend to ingest this data into Cloud Mail as all the original meta data of the mail will be
lost and will all be ingested into the inbox and with the amount of data this will make searching and
organising extremely complex.
Ingestion Options
Cloud Mail
IMAP Sync
Please take note of the following recommendations should you decide to go with the above option:
You need to ensure there is ample connectivity to the mail environment that you are migrating
from. We would recommend 5 users migrated at any one given time per 10Mbps second that
is free and available per link.
It is highly important to be aware that once you start syncing users you will be able to connect
to their mailboxes and can start syncing down data and this will add to the bandwidth
consumption of the link and could potentially add to slowing the sync.
Please take note the data is not synced across in any order and that when downloaded can
cause delays on any new mail coming into the mailbox while this sync is taking place. It is
therefore recommended that syncing be done after hours or on the weekend.
If you have taken an archive mailbox option with your Cloud Mail selection it is important
to note this mailbox is downloaded as a separate folder in our mail client and this will
potentially cause the mail to be downloaded twice if the data has been ingested into the
mailbox and archive mailbox cause more load on your link.
NB: IMAP sync will only move mail across and does not sync calendar entries and contacts.
Zimbra Migration Wizard
Please take note of the following recommendations should you decide to go with the above option:
Only one instance of the Zimbra Migration Wizard can be installed per machine, but you can
run up to 5 windows at a time to 5 separate accounts. You cannot run multiple windows
ingesting data to the same account.
You need to sure there is ample connectivity to the servers that you are uploading from. We
would recommend 5 users migrated at any one given time per 10Mbps second that is free and
available per link.
It is highly important to be aware that once you start uploading users will be able to connect
to their mailboxes and can start syncing down data and this will add to the bandwidth
consumption of the link and could potentially add to slowing the sync.
Please take note the data is not sync’d across in any order and that when downloaded can
cause delays on any new mail coming into the mailbox while this sync is taking place. It is
therefore recommended that syncing be done after hours or on the weekend.
If you have had taken an archive mailbox option with your Cloud Mail selection it is important
to note this mailbox is downloaded as a separate folder in our mail client and this will
potentially cause the mail to be downloaded twice if the data has been ingested into the
mailbox and archive mailbox cause more load on your link.
Hard Drive
Please take note of the following recommendations should you decide to go with the above option:
•The hard drive needs to be a self-powered USB drive
•The hard drive needs to be encrypted with VeraCrypt
•The following formats are accepted for ingestions – EML and PST
•If PST’s are provided, please ensure they are not password protected and are scanned and
optimised
You need to arrange for the shipment collection of the hard drive from the iMail offices
Ingestion Rates
To estimate the ingestion time of your data the ingestion rates to Cloud Mail is estimated at 72 gigs a
day.
SecureArchive
Hard Drive
Please take note of the following recommendations should you decide to go with the above option:
•The hard drive needs to be a self-powered USB drive
•The hard drive needs to be encrypted with Vera crypt
•The following formats are accepted for ingestions – EML and PST
•If PST’s are provided, please ensure they are not password protected and are scanned and
optimised
You need to arrange for the shipment collection of the hard drive from the iMail offices
Ingestion Rates
To estimate the ingestion time of your data the ingestion rates to SecureArchive is estimated at 100
gigs a day.
