Maning

Active Member
Jun 29, 2017
38
6
8
Bulgaria
cPanel Access Level
Root Administrator
I've got a problem with an email:
Code:
Event:    failure error
Sender User:    mydomain
Sender Domain:    mydomain.com
From Address:    [email protected]
Sender:    [email protected]
Sent Time:    Jan 28, 2019, 1:18:13 PM
Sender Host:    xxxxxxx
Sender IP:    xxxxxx
Authentication:    dovecot_login
Spam Score:    -1
Recipient:    [email protected]
Delivered To:   
Delivery User:    -system-
Delivery Domain:   
Router:   
Transport:    fail
Out Time:    Jan 28, 2019, 1:18:13 PM
ID:    1go4vk-0006E8-Og
Delivery Host:   
Delivery IP:   
Size:    2.96 KB
Result:    retry timeout exceeded
When trying to ping from my server mail.remotedomain.com it fails.
When pinging from my server the IP of mail.remotedomain.com, ping is OK.

MX Toolbox test from mail.remotedomain.com

Code:
    SMTP Banner Check    Reverse DNS does not match SMTP Banner     More Info
    SMTP TLS    Warning - Does not support TLS.     More Info
    SMTP Transaction Time    15.609 seconds - Not good! on Transaction Time     More Info
    SMTP Reverse DNS Mismatch    OK - xxxx resolves to xxxxxxx   
    SMTP Valid Hostname    OK - Reverse DNS is a valid Hostname   
    SMTP Connection Time    0 seconds - Good on Connection time   
    SMTP Open Relay    OK - Not an open relay.
 

rpvw

Well-Known Member
Jul 18, 2013
1,101
465
113
UK
cPanel Access Level
Root Administrator
Try to ping the destination remotedomain.com (the subdomain mail.remotedomain.com may not exist in that destination DNS !)
If you cannot resolve it, there may be several reasons:
  • Your resolvers are not functioning as intended
  • There is/was a temporary failure in the destination DNS.
  • The destination DNS records have not yet fully propagated.
  • Either your server, or the destination server is being blocked by some blacklist
  • The destination mail-server is incorrectly configured
  • etc etc
If all other mail from your server is delivered normally, then you have to assume the problem is at the recipient end, and all you can do as a server administrator is reach out to the recipient server operator, and ask for help resolving the issue.
 
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Maning

Active Member
Jun 29, 2017
38
6
8
Bulgaria
cPanel Access Level
Root Administrator
Thanks for your answer!
mail.remotedomain.com has a different IP from remotedomain.com
I can ping remotedomain.com but not mail.remotedomain.com

I can ping mail.remotedomain.com from other server.