Mail-order marriage, also known as international or arranged marriage, has similar outcomes to other types of marriage. Statistics are hard to find due to their private nature, but some studies suggest the divorce rate for mail-order marriages is comparable to or slightly lower than domestic marriages.
The USCIS reports a divorce rate of around 20% for mail-order marriages, significantly lower than the 40-50% rate for domestic marriages in the U.S. This may be due to unique dynamics and commitment levels of those involved.