Bug ID 2457377: Missing MAILTO="" statement in cron files

Last Modified: Sep 09, 2026

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
21.1.0, 21.1.0.1, 21.1.0.2

Opened: Aug 13, 2026

Severity: 4-Minor

Symptoms

/root/dead.letter gets populated with cron job outputs and errors

Impact

/root/dead.letter gets populated with unnecessary emails

Conditions

/etc/cron.d/ file does not have empty MAILTO="" before script execution line

Workaround

/etc/cron.d/ files can be edited manually to add MAILTO="" before line executed by cron

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips