Reporting-MTA: dns; outmail-40.tehila.gov.il

Final-recipient: RFC822; tan_tuan_loy_alex@defense.gov.sg
Action: failed
Status: 4.4.3
X-Supplementary-Info: < #4.4.3 X-Postfix; Host or domain name not found. Name
 service error    for name=defense.gov.sg type=MX: Host not found, try again>