Not gmail, I run my emails through a personal server. I can't find any evidence that it was compromised and I, stupidly, didn't check access logs before they cy

Not gmail, I run my emails through a personal server. I can't find any evidence that it was compromised and I, stupidly, didn't check access logs before they cycled out. I just can't think of any other way that they were able to do the password reset without access to my email. Obviously I immediately changed my password.