Check SMTP Server Availability for ORA-29278 or ORA-29279 errors using UTL_SMTP to Send Email.

(Doc ID 604763.1)

Last updated on APRIL 23, 2018

Applies to:

PL/SQL - Version and later
Information in this document applies to any platform.
***Checked for relevance on 23-Apr-2018***


When trying to send email using UTL_SMTP getting following error :

ORA-29278: SMTP transient error: 421 Service not available
ORA-06512: at "SYS.UTL_SMTP", line 21
ORA-06512: at "SYS.UTL_SMTP", line 97
ORA-06512: at "SYS.UTL_SMTP", line 139

Or potentially

ORA-29279: SMTP permanent error

followed by a SMTP error code.


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