Note that the value entered in the email address field is actually used as an email address by more and more systems for sending automated email messages. So it is important that the data that is in that field contains a valid email address.
Years ago when an email address could first be attached to a membership record, it was simply an informational item and so it wasn't important for the system to verify that it was an actual email address; back then it didn't matter what format was used for entering the information. But now that it is actually used for sending email, it's good that the address is validated.
Also, when the email address was first added to records, it was only a household address, so I can see why you might have wanted to include both the husband's and wife's email address. But now you can specify individual email addresses. So you should make sure that your individual email address and your wife's individual email address are correct. Then for the household email address select whichever one of you wants to receive household email messages.
Questions that can benefit the larger community should be asked in a public forum, not a private message.