Not proud but I have done this when my husband deployed and he requested I email him suggestive pics-nude of myself. I was hesitant but eventually I made two bogus email accounts one for him and one for me and sent him such pics years ago.
I see no problem in sending nude photos to your husband. You are married, when you both are together, you can show yourself naked to him, and sending photos to him is the same in the "virtual" world. You don't need to be ashamed of that.
But there is the problem of privacy. Unless a judge orders that expert should look after deleted files, it is next to impossible that someone could see any files of a deleted mail account. And now, years later, all data have been overwritten by newer files, the data is gone. But the data could have been stolen (copied) when they were on the net.
The crucial question is: what kind of email account did you create? When I receive an email, it is stored at my email provider, and then when I call my mail program it is downloaded on my computer - and no longer in the net (POP3 account). There is a rather small time window where some hacker could possibly steal it from my provider, and of course someone could snatch and copy an email when its send from one internet knot to the other. If you want to avoid this, you should use encryption (without telling the key in the same mail, of course). But unless some agency is spying after you, the probability is high that no-one looked into the mail (except your husband, of course).
But if you used an account where the mails are stored until you delete him (IMAP account), the danger that some hacker got access to files he should not see is larger, because the "time window" is longer. The security measures are not the same at all providers, so I can't tell you how great that danger was (and even if I knew your provider and knew how long such photos were there, I'm not the expert who could tell you). I guess the chance the files were copied by someone are less than 10%, this is only a deliberately pessimistic guess (coupled with the guess that such mails were at your provider for months or even 2 years).
So you have an impression how great the risk may be that someone saw your pictures. If no one hacked your provider, or the computer of your husband or your computer while such files where there, the files are gone, no reason to worry. If there was some leakage, the pictures are somewhere for years. But as no hint to that reached you it is likely that no one stole a picture.