Remote host said: 451 Upstream SMTP server not available/

[ahm1985]

Hi guys in sme server sometimes i cannot send email over outlook using sme server 8.x
when i send message it not reach why
using putty i write the following command
tail -f /var/log/qmail/current
and in messages i notice that message show to me
deferral: Connected_to_127.0.0.1_but_greeting_failed./Remote_host_said:_451_Upstream_SMTP_server_not_available/
This problem is repeated every times it work may be one week then show after this also
email send then stop
How to solve this problem and what can make that problem
my settings is already fixed but the problem sending email is ok working some period
and some period not work
and after that come
can you tell me what problem

 

[ChrisHirst]

And the "Upstream SMTP Server" that your qmail installation uses to send messages is??

my settings is already fixed

Fixed to what?

and after that come

come what ...??

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
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[ahm1985]

Thank you for reply
i write fixed meaning not new settings or change any thing
meaning my settings stable
"and after that come" meaning sending email sometimes work and sometimes not work
and no any settings changed

 

[ahm1985]

So that i ask why that happen

 

[ChrisHirst]

So that i ask why that happen

No idea, I can only guess at "The upstream SMTP server" is not contactable from some reason or other.

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.
Webmaster Forum