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cannot send email URGENT

Posted on 2014-01-31
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Last Modified: 2014-01-31
hi,

I am having an issue where i cant send email it gives me an error of "An error occurred sending mail: SMTP server error. The server responded: is invalid or DNS says does not exist Contact your mail administrator for assistance."

I am really stuck here, i am receiving email fine
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Question by:jonathanduane2010
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by:Patricksr1972
ID: 39823715
Hi

Is this a 'pop' account or exchange issue? What software is used?
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by:jonathanduane2010
ID: 39823720
its a pop account....on an mdaemon server..but downloading the mail is no problem its more sending mail out

i can connect to the smtp server using telnet
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Expert Comment

by:Patricksr1972
ID: 39823724
Ok and how is your SMTP configured on the client that faults?

It is using mdaemon as SMTP or an outside SMTP server? (probably your ISP's)
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Author Comment

by:jonathanduane2010
ID: 39823729
its using mdaemon as an SMTP and i can connect to it fine from any other machine but this one
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by:Patricksr1972
ID: 39823738
Ping you ping the mdaemon machine from that computer?

Ping on ip address and on servername i mean?
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Author Comment

by:jonathanduane2010
ID: 39823740
no...i cant..... not from this machine
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Author Comment

by:jonathanduane2010
ID: 39823742
actually not from any machine it must not be setp to ping
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Author Comment

by:jonathanduane2010
ID: 39823744
the server name is mail.iradio.ie
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by:Patricksr1972
ID: 39823745
Ah it is not configured to ping....

What if you put the ip address and name in the hosts file on that machine like. (guessing here the ip adress is 1.1.1.1)

1.1.1.1       mail.iradio.ie

Save and try to mail again.

(hosts file is located in windows\system32\drivers\etc)
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Author Comment

by:jonathanduane2010
ID: 39823747
sorry, i am trying to ping it over the internet inside the network it works fine
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Author Comment

by:jonathanduane2010
ID: 39823764
i have tried that

its a mac and i put in the hosts file

79.140.211.194  mail.iradio.ie

have tried to ping and no luck
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Expert Comment

by:Patricksr1972
ID: 39823768
What if you send a mail now?
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Author Comment

by:jonathanduane2010
ID: 39823776
i get the same message
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Expert Comment

by:Patricksr1972
ID: 39823777
Ok, what if you compare SMTP settings on a not working machine with a right working machine?

Or what if you temporarily disable the firewall to test?
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Author Comment

by:jonathanduane2010
ID: 39823783
SMTP settings are exactly the same...there is no firewall enabled on the mac...are you talking about the main office firewall
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by:Patricksr1972
ID: 39823811
Are the working and not working machine behind different gateways and or is there any additional error logging available?
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Author Comment

by:jonathanduane2010
ID: 39823814
no both of the laptops, working and none working are connected to the same network...
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Expert Comment

by:Patricksr1972
ID: 39823816
is there any additional error logging available?
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Author Comment

by:jonathanduane2010
ID: 39823824
i dont think so??
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Expert Comment

by:Patricksr1972
ID: 39823825
ok, is the mdaemon server configured to allow SMTP mail from this user?
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Author Comment

by:jonathanduane2010
ID: 39823831
yes...i have tried it from a different machine
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Accepted Solution

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Patricksr1972 earned 500 total points
ID: 39823842
Then there are two more options, the connections is blocked by a firewall OR by a antivirus(or antispam) solution.
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by:Patricksr1972
ID: 39824078
What was it?
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More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

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