An image communication apparatus (100, 101) comprising: acquiring means (230, 234, 239, 240, 238) configured to acquire image data to be attached to an email, selecting means configured to select, based on a user operation, at least one of: a first transmission mode which is an email transmission mode; and a second transmission mode which is an internet FAX transmission mode; characterized in that said image communication apparatus further comprises: authentication means configured to perform authentication processing to authenticate a user of said image communication apparatus using authentication information input by the user; email address setting means configured to set in a From field of a header portion of the email: a first email address that is stored on said image communication apparatus if the first transmission mode is selected by the selecting means, the first email address being an email address associated with the authenticated user; and a second email address that is stored on said image communication apparatus if the second transmission mode is selected by the selecting means, the second email address being an email address of said image communication apparatus; and transmitting means configured to transmit the email to which the acquired image data is attached including the address set in the From field of the header portion of the email, wherein if the second transmission mode is selected the email address setting means is further configured to set the first email address in a Sender field of the header portion of the email. acquiring means (230, 234, 239, 240, 238) configured to acquire image data to be attached to an email, selecting means configured to select, based on a user operation, at least one of: a first transmission mode which is an email transmission mode; and a second transmission mode which is an internet FAX transmission mode; a first transmission mode which is an email transmission mode; and a second transmission mode which is an internet FAX transmission mode; characterized in that said image communication apparatus further comprises: authentication means configured to perform authentication processing to authenticate a user of said image communication apparatus using authentication information input by the user; email address setting means configured to set in a From field of a header portion of the email: a first email address that is stored on said image communication apparatus if the first transmission mode is selected by the selecting means, the first email address being an email address associated with the authenticated user; and a second email address that is stored on said image communication apparatus if the second transmission mode is selected by the selecting means, the second email address being an email address of said image communication apparatus; and transmitting means configured to transmit the email to which the acquired image data is attached including the address set in the From field of the header portion of the email, authentication means configured to perform authentication processing to authenticate a user of said image communication apparatus using authentication information input by the user; email address setting means configured to set in a From field of a header portion of the email: a first email address that is stored on said image communication apparatus if the first transmission mode is selected by the selecting means, the first email address being an email address associated with the authenticated user; and a second email address that is stored on said image communication apparatus if the second transmission mode is selected by the selecting means, the second email address being an email address of said image communication apparatus; and a first email address that is stored on said image communication apparatus if the first transmission mode is selected by the selecting means, the first email address being an email address associated with the authenticated user; and a second email address that is stored on said image communication apparatus if the second transmission mode is selected by the selecting means, the second email address being an email address of said image communication apparatus; and transmitting means configured to transmit the email to which the acquired image data is attached including the address set in the From field of the header portion of the email, wherein if the second transmission mode is selected the email address setting means is further configured to set the first email address in a Sender field of the header portion of the email.