I'm just getting started with Fedora and would like to get some help from the list with sendmail (v8.12). I've Googled groups, and gone through the sendmail docs, without finding--or probably without recognizing--an answer. My ISP (Verizon) requires SMTP-AUTH (user/password PLAIN) to connect to its smarthost. I have the authorization set up, and I'm trying now to configure sendmail masquerading. Currently, mail sent from Evolution is passed to sendmail and then accepted for delivery by the smarthost, even when I configure my address to some other (non-Verizon) domain. Mail sent using /bin/mail, however, bounces off the smarthost with this error: Diagnostic-Code: SMTP; 553 Authentication is required to send mail as <jorge@xxxxxxxxxxx> jorge is my local login, not my login name on the smarthost. (I have an AuthInfo line in /etc/mail/access with my smarthost login and password; it works fine for mail passed in by Evolution.) How can I set up masquerading so it does what Evolution seems to do by rewriting the (envelope?) address using sendmail's -f option? Right now, I have the following in /etc/mail/sendmail.mc MASQUERADE_AS(`verizon.net')dnl FEATURE(masquerade_envelope)dnl FEATURE(masquerade_entire_domain)dnl MASQUERADE_DOMAIN(localhost)dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl MASQUERADE_DOMAIN(verizon.net)dnl I'm new to a lot of this, and I appreciate any help you folks can provide. Thank you, Jorge -- Jorge Luis lists+fedora@xxxxxxxx