Sophos is aware of some low-tech SPAM campaigns where spammers hide content inside usually large yet legitimate-looking email body text.
To address this as of January 16th, 2023, Sophos Email will impose a generous threshold limit on email's body size. Emails that breach the threshold will be considered SPAM and quarantined.
Note: Only the system administrator may release such emails from quarantine.
The Sophos Email team will monitor the change closely and fine-tune the threshold if necessary.