SOLVED SMTP connection from - lost while reading message data

Rafael Gomes

Member
Feb 7, 2017
9
2
3
Florianópolis, Brazil
cPanel Access Level
Root Administrator
Hello,

I use a VPS Server with centOS 7 and Cpanel 74.0 (Build 10). One of my customers are trying to send me some emails but I'm unable to receive them:

[[email protected] ~]# grep /var/log/exim_mainlog | tail
2018-11-16 09:59:12.171 [13336] SMTP connection from mail. (Hostname) [IPServer]:34366 I=[IPServer]:25 lost while reading message data (header)

There's no filter on my VPS. It's a problem that happens sporadically.

Could you guys, please, help me with this one?
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,910
2,211
363
Hello @Rafael Gomes,

This normally happens when there's a firewall or network connection issue between your server and the workstation making the connection attempt. Are you using any firewall rule management utilities such as CSF? If so, check to make sure the customer's IP address isn't blocked. Also, can you verify if you are using any third-party email plugins such as MailScanner?

Thank you.