SMTP 553 RCPTHOSTS Error

darylp

Registered
Apr 17, 2012
3
0
51
cPanel Access Level
Website Owner
Hi all,

I've got a client who is having intermittent issues when sending emails. The error message received is:

SMTP error from remote mail server after RCPT TO:: xxx.domain.com 553 Sorry, that domain isn't in my list of allowed rcpthosts.

I've checked their DNS settings and everything is fine. I have also made sure that they are using "SMTP server requires authentication" in Outlook, to no avail.

Are there any settings in WHM that I could check/change?

Thanks in advance.

Daryl
 

thewebhosting

Well-Known Member
May 9, 2008
1,199
1
68
Try to send from webmail http://www.domain.com:2095 and see if you receive same error there also. If not, then there must be something wrong with your email client settings. If there is any alternative SMTP port then try by using it. Also, verify with your ISP if they allow you to use other SMTP server. Some ISP restricts to use their own SMTP server to send emails.
 

ruzbehraja

Well-Known Member
May 19, 2011
392
11
68
cPanel Access Level
Root Administrator
Hi all,
SMTP error from remote mail server after RCPT TO:: xxx.domain.com 553 Sorry, that domain isn't in my list of allowed rcpthosts.

This is an error from the "Remote mail server", which is the recipients server.

The recipients server seems to be blocking your clients domain name.

If he sends to any other domain / domains do the mails go through?
 

darylp

Registered
Apr 17, 2012
3
0
51
cPanel Access Level
Website Owner
Hi,

Sorry for the delay! I was expecting email notifications to come through.

I am sure they have tried that to no avail. I may get them to use that again for a few days to see.

Thanks.
 

darylp

Registered
Apr 17, 2012
3
0
51
cPanel Access Level
Website Owner
This is an error from the "Remote mail server", which is the recipients server.

The recipients server seems to be blocking your clients domain name.

If he sends to any other domain / domains do the mails go through?
This is the issue, he could four or five emails which would fail with the above. Then on another re-send the email would go through. It doesn't seem to be just affecting one domain it is a variety but just on intermittent periods.

It's a very surreal thing to see. I could understand failing every time but intermittently. Well.
 

ruzbehraja

Well-Known Member
May 19, 2011
392
11
68
cPanel Access Level
Root Administrator
This is the issue, he could four or five emails which would fail with the above. Then on another re-send the email would go through. It doesn't seem to be just affecting one domain it is a variety but just on intermittent periods.

It's a very surreal thing to see. I could understand failing every time but intermittently. Well.
Ok, from what you are saying I am assuming it is not affecting ALL domains and sending to some domains is going through fine.

What I understand of it is that your clients domain is either blacklisted or greylisted by some spam filtering software and all the domains that the mails are bouncing from, are using the same spam filter service.

Since it is not affecting any other of your clients, we can safely single out this domain name.

Was this domain recently transferred to you?