Martin Brennan fa0c796baf
DEV: Fix SMTP bounce regexp (#16019)
Never trust me with regexp. Follow up to
01ef1d08fc0a87be606bc4b0dbbd2a73defffc02,
which did not take into account codes in
the format X.X.XX (with the 2 digits on the end)
2022-02-22 08:54:01 +10:00
..