Topic: Excel attachment rejected

- iRedMail version (check /etc/iredmail-release): 0.9.9
- Deployed with iRedMail Easy or the downloadable installer? Downloadable
- Linux/BSD distribution name and version:  ubuntu 18.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx): nginx
- Manage mail accounts with iRedAdmin-Pro? non-pro
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.

Hi All,

I'm having issue sending .xlsx attachment with error below:

<useremail@mydomain.com>: host ASPMX.L.GOOGLE.com[] said:
    550-5.7.1 [      12] Our system has detected that this message
    is 550-5.7.1 likely unsolicited mail. To reduce the amount of spam sent to
    Gmail, 550-5.7.1 this message has been blocked. Please visit 550-5.7.1
    https://support.google.com/mail/?p=Unso … ssageError 550 5.7.1  for
    more information. l17si1893182wrp.391 - gsmtp (in reply to end of DATA

Note: the error is intermittent, sometimes i can send excel attachment without any error.

your help is really really appreciated.


2 (edited by Neutro 2020-02-06 19:39:25)

Re: Excel attachment rejected


Try this:


Also google "mail server blacklist test" and check your server IP.

If your score is 10/10 and IP not blacklisted then try zipping your file with a password and attach it this way.

Google spam filters are probably triggered by the fact that xlsx files can contain viruses so if you hide it in zip file with password it might help.

Or you can upload your file to http://dl.free.fr and share link in mail with no attachment


Re: Excel attachment rejected

The error is not about Excel of other attachment, but spam policy like too many emails in a certain period, or other reason.


Does my reply help a little? How about buying me a cup of coffee ($5) as an encouragement?

buy me a cup of coffee