If your MX records are wrong, your emails may stop arriving at the correct mail server or may not arrive at all. MX records tell other mail systems where to send your incoming email, so if they point to the wrong place, delivery can fail or go to the wrong server.
Common signs of a wrong MX setup include missing emails, bounced messages, delayed delivery, or mail going to an old provider instead of your current one. In some cases, sending may still work, but receiving will not work properly until the MX records are corrected.
Other DNS records may matter as well. Records such as A, SPF, DKIM, and DMARC do not replace MX records, but they can still affect how email works and how trusted your messages appear.
Good to Know: After fixing MX records, it may still take some time before email starts working normally everywhere because DNS changes do not update instantly.
