They both work for me.
Talking to an attorney about a infringement case.
The only notice I received in the mail was the email I forwarded to you a couple weeks back.
The only notice I've received in the mail is the email I forwarded to you a couple weeks back.
Are both okay here?
If the speaker views the action as something that happened and was competed in the past, he will use the simple past. If the speaker views the action as a recent past action that continues to be important in the present, he could use the present perfect. In many cases, there is no substantive difference.