Quote:with this link, the email is not sending (or is not receive, I can't tell anymore)
Sounds very much like a SPAM filter is preventing a mail with that link from being delivered. Probably because the SPAM filter mis-trusts mails with links in them. (Not suprising given that is how SPAMmers try to get you to visit some dangerous site.) Not much we can do about that. People just have to check their SPAM folders for the mail or declare any mail from the site admin to be "safe".

Normally mail providers inform via a info mail about new possible spam. I get one each day roughly...

I have no spam et I have dont those tests with 3 different emails (3 different providers).

I sincerely believe that the mail is not sent.

I guess you will have to instrument the zenphoto sendmail plugin to see what is happening. Certainly we are not able to recreate this situation so it seems unique to your configuration.

hi

could you explain how to instrument the zenphoto sendmail plugin to see what is happening ?

Only in a general sense because we have no idea what is happening.

But what you do is place statements in the zenphoto_sendmail() function (and perhaps the UTF8->send_mail() function as well) to record what these functions are doing. You will see that they are really quite simple functions, So, for instance, you can dump out things like the parameters being passed to UTF8->send_mail() and be sure that it is being called for both the admin and the user.

See what paths are taken through each function as well. Generally you need to find some clue as to why one mail is not being delivered and the other is.