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In the last 4 days, my mail server cant send mail to some domains. I receive these errors:
(abc (at) aygaz.com.tr), Result: failed, Status: 5.5.1 501 Syntax error in command parameter(s) Domain name expected
(abc (at) total.com.tr), Result: failed, Status: 5.5.1 501 Syntax: HELO hostname
(abc (at) telemaks.com.tr), Result: failed, Status: 5.5.1 501 Syntactically invalid HELO argument(s)
(abc (at) ziraatbank.com.tr), Result: failed, Status: 5.5.1 501 Syntax error in parameters or arguments
(abc (at) normsan.com), Result: failed, Status: 5.5.1 501 5.5.1 HELO/EHLO requires domain address
I looked the log files for last 2 years, but find this problem only
last 4 days. I searched the error code, but cant solve the problem.
Error code descriptions tell same things. "Your email adress, domain
invalid, character problem etc."
There is Kerio Mail Server 6.7 on Windows Server 2003.
I tried to send from different IP adresses, domains, web mail/outlook
and disabled antivirus program on the server but problem can't solved.
Mail server ip adresses aren't blocked by blacklists.
What is the reason of this problem, and how can I solve it?
Thanks.
sendmail
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asked Jul 27 '11 at 8:50
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Faruk KAHRAMAN
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closed as off topic by
Hans Olsson,
Will Sep 2 '11 at 14:35
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1 Answer
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Typically, after connecting to an SMTP server, the first line of the request is simply:
HELO
It looks as if the SMTP server you're connecting to now expects the hostname as an argument:
HELO example.com
Make the change and retry.
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problem is solved before your
answer but Thanks very much! HostName was deleted on mail server, so
problem occured. After I edited hostname, problem is solved. Best
regards
–
Faruk KAHRAMAN
Jul 27 '11 at 10:05
Glad you got it sorted.
–
Mikaveli
Jul 27 '11 at 10:22