To use these add-ons, you'll need to download Firefox.

Log in
Add-on icon

Reviews for GMX MailCheck for Firefox

GMX MailCheck for Firefox by 1&1 Mail & Media GmbH

2.9 Stars out of 5
5
44
4
16
3
9
2
11
1
54
Response by 1&1 Mail & Media GmbH

Developer response

posted 4 years ago
Dear Mr. Bullinger,

Thank you for your feedback. We are sorry that you are not satisfied.
Please write us an e-mail to mozdev@1und1.de. We are glad to assist you with your problem!

Best regards,

Your MailCheck team