А где это настраивается, тк www-data это пользователь самой ubuntu и я явно его нигде не указывал
; For Unix only. You may supply arguments as well (default: "sendmail -t -i").
Feb 8 16:20:11 topserver sendmail[4830]: r18CKB0B004830: from=www-data, size=10637, class=0, nrcpts=2, msgid=<redmine.journal-4.20130208162011@example.net>, relay=www-data@localhost
Feb 8 16:20:16 topserver sm-mta[4831]: r18CKBBg004831: from=<www-data@topserver.local>, size=10733, class=0, nrcpts=2, msgid=<redmine.journal-4.20130208162011@example.net>, proto=ESMTP,$
Feb 8 16:20:16 topserver sendmail[4830]: r18CKB0B004830: to=2759026@gmail.com,aserus@mail.ru, ctladdr=www-data (33/33), delay=00:00:05, xdelay=00:00:05, mailer=relay, pri=70637, relay=[$
Feb 8 16:20:17 topserver sm-mta[4833]: STARTTLS=client, relay=gmail-smtp-in.l.google.com., version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-RC4-SHA, bits=128/128
Feb 8 16:20:18 topserver sm-mta[4833]: r18CKBBg004831: to=<2759026@gmail.com>, ctladdr=<www-data@topserver.local> (33/33), delay=00:00:07, xdelay=00:00:02, mailer=esmtp, pri=160733, rel$
Feb 8 16:20:18 topserver sm-mta[4833]: r18CKBBg004831: to=<aserus@mail.ru>, ctladdr=<www-data@topserver.local> (33/33), delay=00:00:07, xdelay=00:00:00, mailer=esmtp, pri=160733, relay=$
Feb 8 16:20:18 topserver sm-mta[4833]: r18CKBBg004831: r18CKIBg004833: DSN: Service unavailable
Feb 8 16:20:18 topserver sm-mta[4833]: r18CKIBg004833: to=<www-data@topserver.local>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30000, dsn=2.0.0, stat=Sent
Feb 8 16:33:46 topserver sendmail[5303]: r18CXkPV005303: from=www-data, size=4467, class=0, nrcpts=2, msgid=<redmine.issue-3.20130208163346@example.net>, relay=www-data@localhost
Feb 8 16:33:46 topserver sm-mta[5304]: r18CXkiK005304: from=<www-data@topserver.local>, size=4560, class=0, nrcpts=2, msgid=<redmine.issue-3.20130208163346@example.net>, proto=ESMTP, da$
Feb 8 16:33:46 topserver sendmail[5303]: r18CXkPV005303: to=2759026@gmail.com,walkrus@gmail.com, ctladdr=www-data (33/33), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=64467, rela$
Feb 8 16:33:46 topserver sm-mta[5306]: STARTTLS=client, relay=gmail-smtp-in.l.google.com., version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-RC4-SHA, bits=128/128
Feb 8 16:33:48 topserver sm-mta[5306]: r18CXkiK005304: to=<walkrus@gmail.com>,<2759026@gmail.com>, ctladdr=<www-data@topserver.local> (33/33), delay=00:00:02, xdelay=00:00:02, mailer=es$