smtp07.lidc.telus.com has no MX records.
Question and response
Question
dig smtp07.lidc.telus.com. MX
Answer
The response has no answer records.
Authority
smtp07.lidc.telus.com. 86400 SOA dns01.lidc.telus.com. support.lidc.telus.com. 2025020300 86400 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0