Thank you for reaching out to the Community! We completely understand how you would like to remove some clutter from that drop down list. Those email addresses are all verified under your My Settings tab, so please click here to view the steps on how to remove them.
Zoe_H Community & Social Media Support
Did I answer your question? If so, please mark my post as an "Accepted Solution" by clicking the Accept as Solution button in the bottom right hand corner of this post.