Help with email bounceback message

GinG · 18 Dec 2015 at 14:36

Hi guys,

I am trying to send an email to a customer however keep getting this bounce back message. Is it a problem my end or customer end? I have changed the names to keep private.

This message is from the Websense email protection system, TRITON AP-EMAIL at host smtp-277A-C.domain.com.

The attached email could not be delivered to one or more recipients.

For assistance, please contact your email system administrator and include the following problem report:

<[email protected]>: host 192.28.32.133[192.28.32.133] said: 550 #5.1.0 Address
rejected. (in reply to RCPT TO command)

Anything I can do?

yashiro · 18 Dec 2015 at 14:42

Can you mail other people outside of your network?

If yes, probably customers fault.
If no, your fault.

GinG · 18 Dec 2015 at 15:16

yashiro said:
Can you mail other people outside of your network?

If yes, probably customers fault.
If no, your fault.

Yeah no problems sending mail to other customers.

m4cc45 · 18 Dec 2015 at 15:51

The sending address is potentially wrong.

That's what it looks like from the reply though I could be reading it wrong.

M.

yashiro · 18 Dec 2015 at 16:12

RCPT TO 500 usually means the person/address is not a verifiable address.

http://www.inmotionhosting.com/support/email/bounceback-errors/fixing-no-such-user-here

mysticsniper · 18 Dec 2015 at 16:17

Are you sending a newly crafted email, or replying to one of their emails?

Below is a really good site for checking issues with external companies SMTP servers

http://mxtoolbox.com/SuperTool.aspx

randal · 18 Dec 2015 at 16:24

There's a couple of things that can cause this ranging from the simple such as a incorrectly typed address, or a fault in the address mapping on the gateways.

That looks like it could be the mail gateway doesn't know about the recipient, typically you have allowed recipient maps that are dynamically updated on the gateway to reduce the incoming load on the internal mail server. We use maps pulled from AD, and shipped to a Postfix gateway for example.

Either way, customer's end problem. Send a fax.

BuToNz · 18 Dec 2015 at 16:26

Are you using Outlook to send this? If so when you select the contact in the 'to' field click the little X next to it to delete it from your 'history'.

Then retype the email address you are sending to manually.

Steveocee · 18 Dec 2015 at 21:25

As above, it looks like a bad email address.

tribz · 18 Dec 2015 at 22:03

Another possibility, I used to get a bounce from one client with a similar message. Turned out she had added me to junk senders in Outlook. The bounce didn't say anything about this just 'delivery failed'

HungryHippos · 18 Dec 2015 at 22:12

work with email a lot. If the NDR is coming back from their mail gateway or servers then the email has reached their network, but they are rejecting it. Very little you can do if this is the case, they'd need to sort it if the email address is correct.

Removing from Outlook cache as per above recommendation may help but that is more useful if you are in the same exchange organization as "internal" emails can be delivered directly to a mailbox rather than going via normal SMTP delivery.

Steveocee · 19 Dec 2015 at 11:44

Sometimes the sender can enter the reply to address incorrectly. This may be the issue if you are replying directly.

Caged · 19 Dec 2015 at 12:18

This is a really good tool if you're struggling with message header stuff:

https://toolbox.googleapps.com/apps/messageheader/