1 Topic by blghnpyrz

  • blghnpyrz
  • Member
  • Offline
  • Registered: 2025-02-18
  • Posts: 5

Topic: Sender domain must not be server FQDN.

Hello,
I installed iRedmail 1.7.2 on Debian 12. I downloaded in iRedmail site and install via bash script. Installation ended without any problem. iRedmail server working perfectly. My mail server FQDN name is; mx.formdata.com. I created two domain. First domain name is formdata.com, and second domain name is coyatechnology.com. When I sent the mail, mail trying going from user@mx.formdata.com server FQDN. I mean, when I sent the mail, server try from mail user@mx.formdata.com address.
when I try to send mail from user@coyatechnoloy.com, server try from user@mx.formdata.com

However, when I sent mail from user@formdata.com it must go from user@formdata.com.  Or when I sent from user@coyatechnology.com it must be sent from user@coyatechnology.com.

how to solve sender domain?

----

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

2 Reply by Cthulhu

  • Cthulhu
  • Member
  • Offline
  • Registered: 2019-06-04
  • Posts: 931

Re: Sender domain must not be server FQDN.

How did you try to send the email?

3 Reply by blghnpyrz

  • blghnpyrz
  • Member
  • Offline
  • Registered: 2025-02-18
  • Posts: 5

Re: Sender domain must not be server FQDN.

I tryed from SOGo web interface.

4 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
  • Offline
  • Registered: 2009-05-06
  • Posts: 31,228

Re: Sender domain must not be server FQDN.

Do you mean this error?
https://docs.iredmail.org/errors.html#r … e-username

5 Reply by blghnpyrz

  • blghnpyrz
  • Member
  • Offline
  • Registered: 2025-02-18
  • Posts: 5

Re: Sender domain must not be server FQDN.

I Think, no, but I don't sure smile

It would be better to explain with screenshots.
SS1- My Server Hostname
SS2- My e-mail domain name is bpoyraz@microcloud.com.tr
SS3- Sender domain is bpoyraz@mx.formdata.com.tr

Post's attachments

1.png
1.png 9.89 kb, file has never been downloaded. 

2.png
2.png 14.15 kb, file has never been downloaded. 

3.png
3.png 40.56 kb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.

6 Reply by Cthulhu

  • Cthulhu
  • Member
  • Offline
  • Registered: 2019-06-04
  • Posts: 931

Re: Sender domain must not be server FQDN.

that is an autogenerated bounce email which always uses the hostname to prevent double bounces

7 Reply by blghnpyrz (edited by blghnpyrz 2025-02-20 00:59:10)

  • blghnpyrz
  • Member
  • Offline
  • Registered: 2025-02-18
  • Posts: 5

Re: Sender domain must not be server FQDN.

I am waiting for your valuable opinions. How can I send mail from @mx.formdata.com.tr instead @microcloud.com.tr?

According to my research, this is related with dovecot, but I couldn't figure it out.

8 Reply by Cthulhu

  • Cthulhu
  • Member
  • Offline
  • Registered: 2019-06-04
  • Posts: 931

Re: Sender domain must not be server FQDN.

Mail domain cannot be the same as hostname, this gets mentioned during installation process

9 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
  • Offline
  • Registered: 2009-05-06
  • Posts: 31,228

Re: Sender domain must not be server FQDN.

MTA (Postfix) handles emails sent to system users (e.g. root) and virtual email addresses (stored in MySQL/PgSQL/LDAP). For system users, their email address is "<system-user-name>@<server-hostname>", so you cannot use server hostname as a virtual email domain name, otherwise MTA doesn't recognize the account.

10 Reply by blghnpyrz

  • blghnpyrz
  • Member
  • Offline
  • Registered: 2025-02-18
  • Posts: 5

Re: Sender domain must not be server FQDN.

Thank you.