relay=gmail-smtp-in.l.google.com. [74.125.53.26], dsn=5.0.0, stat=Service unavailable

というようなことを言われるので、手で (久振に) smtp でメールを送ろうとしたら、 次のような結果に:

550-5.7.1 [218.44.234.233       1] Our system has detected an unusual rate of
550-5.7.1 unsolicited mail originating from your IP address. To protect our
550-5.7.1 users from spam, mail sent from your IP address has been blocked.
550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review
550 5.7.1 our Bulk Email Senders Guidelines. e9si19655681pbo.225
Connection closed by foreign host.
ttyp0:makoto@mail 12:34:44/111010(~)>