We have a issue like this. We have a e-mail program (PL/SQL stored procedure which is called from a 10g R2 form) which sends e-mails using UTL_SMTP. It was working but suddenly from day-before-yesterday stopped working. Mail admin says he did not change any mail server paras.
The DB is in Linux so is the mail server. We finally did a code change. Now the mail goes to SMTP server but the mail does not go out of it (to a gmail address). We did a trace of the SMTP log and found out that it throws *550 automated@suninsurance.com.fj must check for new mail first* .
Here is the SMTP server log:
[192.168.0.6:25]
Wed 2012-04-25 18:52:46: --> 220 suninsurance.com.fj ESMTP MDaemon 12.5.4; Wed, 25 Apr 2012 18:52:46 +1200
Wed 2012-04-25 18:52:46: <-- HELO 192.168.0.6
Wed 2012-04-25 18:52:46: --> 250 suninsurance.com.fj Hello 192.168.0.6, pleased to meet you
Wed 2012-04-25 18:52:46: <-- MAIL FROM:automated@suninsurance.com.fj
Wed 2012-04-25 18:52:46: --> 250 <automated@suninsurance.com.fj>, Sender ok
Wed 2012-04-25 18:52:46: <-- RCPT TO:peter.silva@gmail.com
Wed 2012-04-25 18:52:46: --> 550 automated@suninsurance.com.fj must check for new mail first
Wed 2012-04-25 19:02:45: Connection timed out!
Wed 2012-04-25 19:02:45: SMTP session terminated (Bytes in/out: 96/256)
Wed 2012-04-25 19:02:46: ----------
Wed 2012-04-25 19:20:11: Session 17159; child 1
What could be the problem here? Any help would be greatly appreciated.