[FATAL] SMTP -> ]ERROR: RCPT not accepted from server. Code: 553 Reply: 553 5.7.1

Can someone please help with this issue… what you see below is my sugarcrm.log I am using suitecrm version 7.1.2 build 1220 but for some reason there are many issues with the mailing system and the way that sugar handles emails… I am not sure about others here but this is the BEST thing about this CRM the fact that you can do so much with the mail… i.e. even send followup emails to your leads / clients… can you please help I am not that much of a newbie but i dont understand why so many people are having these same issues … :frowning: This may be something stupid that i am doing but everything else works on my servers… just this sensitive application is driving me crazy… PLEASE HELP

root@mydomain:ok/var/www/SuiteCRM# more sugarcrm.log
Sun Jul 27 19:52:07 2014 [577][ca31f887-784d-814d-2d6b-53ca8597bd33][FATAL] SMTP -> ]ERROR: RCPT not accepted from server. Code: 553 Reply: 553 5.7.1 myusername@mydomain.com
: Sender address rejected: not owned by user otheruser@domain.com

Sun Jul 27 19:52:07 2014 [577][ca31f887-784d-814d-2d6b-53ca8597bd33][FATAL] SugarPHPMailer encountered an error: SMTP Error: The following recipients failed: client@domain.com
Sun Jul 27 19:52:07 2014 [577][ca31f887-784d-814d-2d6b-53ca8597bd33][FATAL] Email delivery FAILURE:Array
(
[date_entered] => 2014-07-27 19:49:53
[date_modified] =>
[user_id] => ca31f887-784d-814d-2d6b-53ca8597bd33
[id] => 4754
[campaign_id] => bccb5a03-23a1-735b-8662-53d54e5070fe
[marketing_id] => ac5ae31b-1f9e-df1f-97bb-53d54f5f7369
[list_id] => 847e229e-3e48-262b-67bb-53d215723049
[send_date_time] => 0000-00-00 00:00:00
[modified_user_id] =>
[in_queue] => 0
[in_queue_date] =>
[send_attempts] => 0
[deleted] => 0
[related_id] => 8fc75882-65a6-b24c-4d41-53ca8f61c05c
[related_type] => Leads
)

Sun Jul 27 19:52:07 2014 [577][ca31f887-784d-814d-2d6b-53ca8597bd33][FATAL] Email delivery error:Array
(
[date_entered] => 2014-07-27 19:49:53
[date_modified] =>
[user_id] => ca31f887-784d-814d-2d6b-53ca8597bd33
[id] => 4754
[campaign_id] => bccb5a03-23a1-735b-8662-53d54e5070fe
[marketing_id] => ac5ae31b-1f9e-df1f-97bb-53d54f5f7369
[list_id] => 847e229e-3e48-262b-67bb-53d215723049
[send_date_time] => 0000-00-00 00:00:00
[modified_user_id] =>
[in_queue] => 0
[in_queue_date] =>
[send_attempts] => 0
[deleted] => 0
[related_id] => 8fc75882-65a6-b24c-4d41-53ca8f61c05c
[related_type] => Leads
)

All HELP would be greatly appriceated

Can anyone help me with this not really cherry picked problem :frowning: cant send emails with this wonderful program… HELP…!!! please

Below is the meaning of SMTP 5.5.3 error:

[table]
[tr]
[td]SMTP Status Code[/td]
[td]What the message may mean[/td]
[/tr]
[tr]
[td]553 – Requested action not
taken – Mailbox name
invalid.
or
You are attempting to
send emails through
a specific ISP’s SMTP
server without
authentication and
without being
connected to the
Internet through that
ISP’s service
or
You are sending from
an Exchange server
configured to send
via DNS and you do
not have a public
reverse DNS record
pointing back to your
Exchange server
(also called SMTP Error 5.5.3)[/td]
[td]SMTP Error 553 : There is an invalid email address in
the “To“, “CC”, or “BCC” field of the email message.
Here is a typical SMTP Error 553 response :
”Hi. This is the QMAIL-send program at . I’m
afraid I wasn’t able to deliver your message to the following
addresses. This is a permanent error; I’ve given up. Sorry
it didn’t work out. <Email-address-you’re-sending-to> :
does not like recipient. Remote
host said: 553 5.3.0 <Email-address-you’re-sending-to>.
Addressee unknown. Giving up.”.

SMTP Status 553 is also sometimes returned by an ISP
mail server. When this happens this is almost always
because you are trying to send through a specific
ISP’s SMTP server and yet you are not connected to
the Internet through that ISP; for example : you have
connected to the Internet through a Comcast broadband
connection but your email program (Outlook Express,
Windows Mail, …) is configured to send emails through the
SMTP server of Tiscali. A typical such error message
might be : “553 sorry, relaying denied from your location”.

SMTP Error 553 can also be received if you are sending
from a Microsoft Exchange server configured to send
directly via DNS (rather than by relaying to an ISP’s
SMTP server) and there is no public reverse DNS
record pointing back to the public IP of your Exchange
Server, in which case some receiving mail servers return
a 553 error because they weren’t able to verify that your
server’s HELO name matched its public outgoing IP
address. A typical error message for this 553 response
might be : "5.5.0 smtp;553 sorry, that domain isn’t allowed
to be relayed thru this MTA (#5.7.1)” or “5.5.0 smtp;553
sorry, that domain isn’t in my list of allowed rcpthosts
(#5.7.1)”.[/td]
[/tr]
[/table]

Thank you for all of the great explanation regarding SMTP error codes, however, I am using my own server with Ubuntu 12.4 I also have total control over postfix and dovecot… The mail works with all other applications but this one for some reason is not working… is there a place that i can start looking in general when this happens…