I'm facing a very odd issue while trying to send mails.
I have a virtual network between 2 cloud istance. I use that private network IP to send mails from the web server throught the SMTP/CPanel server, with authentication.
I created an email account on the CPanel server which I use just for this and on the web server I have a service wich aysnchronously forwards e-mails to be sent to CPanel server and it has also settings for throttling and such.
The odd thing I'm facing is that if I'm sending like 2-3 email it works perfectly. If I try to send 1000+ emails i receive an authentication error like the following:
Description: SERVER_ERROR: 535 Incorrect authentication data
Error code: 535
MTA: ip.ip.42.133
SMTP Conversation:
Sun, 23 Feb 2014 14:52:30 +0100
Connecting ip.ip.42.133 25
Connected
220-mail.myserver.net ESMTP Exim 4.82 #2 Sun, 23 Feb 2014 14:53:13 +0100
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
EHLO mail.myserver.net
250-mail.myserver.net Hello provider.com [ip.ip.42.236]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
AUTH LOGIN
334 VXNlcm5hbWU6
*REDACTED*
334 UGFzc3dvcmQ6
*REDACTED*
535 Incorrect authentication data
Any hint on were to look for this? Maybe too many mails in a few time (like 1000 in less than 1 minute?)
Or could this have something to do with a bad Helo domain? I used a domain wich actually was on the CPanel/SMTP server rathar than a domain from the Web server (which was sending the mail through the other one)
Thanks in advance
I have a virtual network between 2 cloud istance. I use that private network IP to send mails from the web server throught the SMTP/CPanel server, with authentication.
I created an email account on the CPanel server which I use just for this and on the web server I have a service wich aysnchronously forwards e-mails to be sent to CPanel server and it has also settings for throttling and such.
The odd thing I'm facing is that if I'm sending like 2-3 email it works perfectly. If I try to send 1000+ emails i receive an authentication error like the following:
Description: SERVER_ERROR: 535 Incorrect authentication data
Error code: 535
MTA: ip.ip.42.133
SMTP Conversation:
Sun, 23 Feb 2014 14:52:30 +0100
Connecting ip.ip.42.133 25
Connected
220-mail.myserver.net ESMTP Exim 4.82 #2 Sun, 23 Feb 2014 14:53:13 +0100
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
EHLO mail.myserver.net
250-mail.myserver.net Hello provider.com [ip.ip.42.236]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
AUTH LOGIN
334 VXNlcm5hbWU6
*REDACTED*
334 UGFzc3dvcmQ6
*REDACTED*
535 Incorrect authentication data
Any hint on were to look for this? Maybe too many mails in a few time (like 1000 in less than 1 minute?)
Or could this have something to do with a bad Helo domain? I used a domain wich actually was on the CPanel/SMTP server rathar than a domain from the Web server (which was sending the mail through the other one)
Thanks in advance
Last edited: