Hello I think there are a wrong regexp in sendmail function in templates/shareinline.vm (xwiki 5.4.1) #if ($serverName.matches('\[.*\]|(\d{1,3}+\.){3}+\d{1,3}+')) #if ("$!{xwiki.getXWikiPreference('admin_email')}" != '') #set ($sender = "$!{escapetool.q($sender)} <$!{xwiki.getXWikiPreference('admin_email')}>") #else #set ($sender = "$!{escapetool.q($sender)} <[email protected]>") #end #else #set ($sender = "$!{escapetool.q($sender)} <noreply@$!{serverName}>") #end I filled admin_email and my my nameserver is "iwiki.cp2i.i2" but i tried with "iwiki.cp2i.fr" to. I don't understand very well the regexp (writing a regexp is simpler to read it) but when I send a mail with xwiki I felt in "#set ($sender = "$!{escapetool.q($sender)} <noreply@$!{serverName}>")" condition... Pascal B