1 Topic by bigman

  • bigman
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  • Registered: 2015-09-14
  • Posts: 41

Topic: Error sending email

==== Required information ====
- iRedMail version (check /etc/iredmail-release):  0.9.4
- Linux/BSD distribution name and version: Ubuntu 14.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? Yes
- Related log if you're reporting an issue:
====

hi today we are facing problem that some emails can't be send.
When I check in postqueue -p , some error are "lost connection with mx.example.com while receiving the initial server greeting"
And some error are "host mx.example.com refused to talk to me : 421 service not available (connection refused, too many connections) "

How to fix the problem ?

Need your help asap

thanks

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
  • Posts: 31,172

Re: Error sending email

bigman wrote:

lost connection with mx.example.com while receiving the initial server greeting

Seems it rejected your smtp request, or there's something wrong with their MTA setup, or there's something wrong with the network between your server and the recipient's server.

bigman wrote:

host mx.example.com refused to talk to me : 421 service not available (connection refused, too many connections)

Recipient's server rejected your smtp request. Seems your server sent many emails to this server in a short time?

3 Reply by bigman

  • bigman
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  • Registered: 2015-09-14
  • Posts: 41

Re: Error sending email

Hi Zhang,

Thanks for the reply

ZhangHuangbin wrote:
bigman wrote:

lost connection with mx.example.com while receiving the initial server greeting

Seems it rejected your smtp request, or there's something wrong with their MTA setup, or there's something wrong with the network between your server and the recipient's server.

I also tried to contact my ISP for this.

ZhangHuangbin wrote:
bigman wrote:

host mx.example.com refused to talk to me : 421 service not available (connection refused, too many connections)

Recipient's server rejected your smtp request. Seems your server sent many emails to this server in a short time?

No we don't send many emails, the email in queue is just about 30 emails (with different destination).

Any other suggestion to solve this ?
Please help

thanks

4 Reply by bigman

  • bigman
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  • Registered: 2015-09-14
  • Posts: 41

Re: Error sending email

hi Zhang,

We already find the problem, it is because our ISP try to scan ip , because they are facing spam mail, so they relay the email from their customers to their smtp, and it cause that problem.
Now it's already solve

thanks