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.
Not at this time, but since threshold is generous, most won’t even notice this change.
Is there any possibility of knowing what that threshold even is..?