Error Message : Failed to send your message. Please try later or contact the adm

FAQ After submitting the form, I get an error message stating “Failed to send your message”. What is wrong?

H have the same problem.

the answer in the FAQ don’t help me a lot. … ok I saw that I have mail server trouble.
I try to change the name of the sender in the admin. I try to setup a external SMTP …
nothing change. any Idea?

my Hosting is: infomaniak.ch
the website is : https://www.ess-lesmosses.ch/presentation/#3rdPage

Though the plugin successfully sends millions of emails every day, there are a host of issues that can stop or delay emails on both the sending and receiving ends. It depends entirely on your local Server & WordPress configuration. You will need to investigate this issue for your particular local configuration.

See Contact Form 7 Email Issues. There is a link at the bottom of the page to a comprehensive and detailed article which covers a range of issues. Most people that work through this information appear to be able to resolve their email sending & receiving issues.