Send Message Disposition Notifications with an empty sender string. Some servers might be configure to reject such messages, so if you are experiencing problems sending MDNs, uncheck this option.
Lêsbefêstigings ferstjoere mei in lege stjoerder. guon tsjinners kinne dizze berjochten wegerje. Wannear jo swierrichheid ûnderfine mei it ferstjoere fan lêsbefêstigings moatte jo dizze opsje útsette.