The setting determines which mailbox will appear in the "From"In letters sent from the site using the function mailwhen the sender is not explicitly specified by the script itself.
To specify a mailbox for outgoing mail, do the following:
If the site script that sends using the mail function does not explicitly specify the sender's mailbox (does not add the header “From") And in the field"Outgoing mail"No mailbox is selected, then in the"From"The address will be substituted account mail... This could be the cause of delivery problems. IN mail log from the web server in the column "from"At the same time will appear hosting account name.