I would know something about a few problems which I observe on my institution.
Our OS is OpenBSD 6.3 and an e-mail server is postifix with Openwebmail client mail. After migration to Linux CentOS 5.4 some problems ocurred: lost e-mails; folders names which has simbols or serifa did not recognize, etc.
Are there any precaution in this migration that could to impede this?
There are idea to migrate other service, but I have fear.