How to limit mail in workflow when the user click transition button?

[Andrew]

My mail depends on event . But when one user click one workflow button ,there will be send three or four mails to the user.Now all users complain to me there are too many mails to them.

The Environment of my workflow is when one user open a issue,he only need click workflow button,then a Dialog will appear ,then he must write comment, must change developer,must write the time he spent in this action , he do these in this Dialog . Now the question is he click one workflow button to execute a action,but there are three mails send to him , One mail is for write comment,one mail is for change developer,one mail is for write the time he spent in this action . So what method can I do to one user click a workflow button only send one mail to him?

[Nic Brough -Adaptavist-]

Your developer is executing three different actions, so there's three different emails.

Make sure that the transition screen for the workflow action includes the comment, developer and worklog fields, and that he uses that insted of doing three different things, and it will only trigger one event, and hence one email.