External Server Reject Email : 450 4.7.1 Client host rejected: cannot find your hostname, [190.41.X.X]

May 17, 2008 11:34am pdt

1. jar3817 19,165
2. Nopius 18,975
3. RaulDias 16,875
4. PsiCop 16,575
5. _jesper_ 10,600
6. war1 9,100
7. kieran_b 8,000
8. fgrushevsky 6,290
9. grblades 5,500
10. hielo 5,375
11. mwecompu... 4,500
12. kenfcamp 4,150
13. nplib 4,000
14. Abs_jaipur 3,000
15. Bibliophage 2,800
15. Norush 2,800

1. jlevie 347,626
2. PsiCop 243,064
3. anfi 85,387
4. jar3817 64,574
5. Nopius 64,125
6. kenfcamp 47,413
7. markt9 39,546
8. Sembee 28,311
9. war1 25,775
10. it_alche... 25,390
11. samri 25,291
12. grblades 22,095
13. _jesper_ 20,800
14. HalldorG 18,447
15. ygoutham 17,675

05.08.2008 at 11:30AM PDT, ID: 23387141 | Points: 500

	[x] Attachment Details

External Server Reject Email

Zones: Exchange Email Server, SendMail Email Server, Email Servers

Tags: 450 4.7.1 Client host rejected: cannot find your hostname, [190.41.X.X]

Hi Everyone,
i'm using an exchange 2003 server like 2 years ago.
and i have the dns reverse set to all my domains.
where my problem is i have a domian called "esconsa.net" and trying to send email to "inei.gob.pe" but the email is not sending correctly.
i use the smtpdiag tool to check what's happen and i receive this error:

450 4.7.1 Client host rejected: cannot find your hostname, [190.41.41.230]
Error: se esperaba "250". El servidor rechazó la dirección del destinatario.
Error al enviar correo a mail.inei.gob.pe.

otherside i make the same test but from the email server and the tool show me a sucefull send. (in green)
anybody have an idea?

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Question Stats

Zone: Software

Question Asked By: gesquivel

Question Asked On: 05.08.2008

Participating Experts: 2

Points: 500

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05.09.2008 at 05:10AM PDT, ID: 21531934

Rank: Guru

Network_Data_Support:

would think that it is to do with DNS somewhere the only thing i can think of is the mail greeting

The server should have an A record which points to the mailserver for the hostname
which is presented in the greeting

mail.esconsa.net
220 mailserver.dns1.esconsa.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at Fri, 9 May 2008 07:06:13 -0500

05.14.2008 at 12:07PM PDT, ID: 21567609

kam_uk:

I've just checked dnstuff.com and 190.41.41.230 has no PTR (i.e reverse DNS) record
You need to talk to your ISP about this, I assume this is the reason the remote domain is not accepting your mail.

05.14.2008 at 01:47PM PDT, ID: 21568528

gesquivel:

Hey kam uk
that's my computer!
the server points to other IP.
i'm trying to send email from my computer using the server (obviosly)

Thanks
Tavo

20080236-EE-VQP-29 / EE_QW_2_20070628