Using email addresses for usernames in UNIX

[cbnsingram]

I have email users on multiple domains with the following requirements.
1. Must use the same name on each email address (example listen@ezpromote.com, listen@hosts-inc.com, etc....)
2. Mail for each account must be go to a unique inbox.
3. When logging in the user must use the full email address as his/her login name.

This is a Redhat 7.2 server with Sendmail 8+

What I've tried:
1. I have created unix accounts using the desired email address for user name. (example: listen@ezpromote.com)
2. I have created a virtuser table entry of (listen@ezpromote.com listen@ezpromote.com).
3. I have added ezpromote.com to my local domains list.

Problem: Emails sent to listen@ezpromote.com receive the following error:

"The following addresses had delivery problems:
<listen@ezpromote.com>
Permanent Failure: 554_5.0.0_rewrite:_excessive_recursion_(max_50),_ruleset_canonify&quot;

Am I trying something impossible? Is there a better solution to my needs that still includes Sendmail?

 

[dbase77]

Hi,

did create user listen or listen@ezpromote.com?

regards,
feroz

 

[cbnsingram]

I created listen@ezpromote.com. Unix accepts this as a legal username, but Sendmail will not look for this username when delivering mail. If unix account &quot;listen&quot; is present sendmail delivers &quot;listen@ezpromote.com&quot; to &quot;listen's&quot; inbox. But, &quot;listen&quot; might belong to an entirely different user.

I believe I need one of two things.
1. A way to force sendmail to look at the entire email address of &quot;listen@ezpromote.com&quot; first to see if it exists as a unix user. If yes, deliver. If not, look for an account of just &quot;listen&quot;.

OR

2. A third-party virtual email account management program such as can be done with qmail/vpopmail.

I currently use qmail/vpopmail and SquirrelMail but am trying to move back to sendmail. Qmail just is not working smoothly enough.

 

[dbase77]

Hi,

I dont think so sendmail will understand listen@domain.com@domain.com . I suggest you use virtual address in sendmail. With virtual address, you dont have to create unix account. Refer to sendmail.org.

regards,
feroz

 

[cbnsingram]

I had no idea a virtual address option was available. Thanks so much.

 

[nine97]

Hello,

There are 2 solutions to this problems:
1. Create the unix usernames as email address (listen@domain.com). In the sendmail virtusertable, create the entry &quot;listen@domain.com listen\@domain.com&quot;
Also create the same entry in genericstable, &quot;listen\@domain.com listen@domain.com&quot;
The back slash will work.
This solution will allow the user to login using their own email and password
2. Another solution is to create a unix user name listen-domain.com. have listen@domain.com point to listen-domain.com
The user will have to login in using listen-domain.com

I prefer the second approach. I figure out the 1 approach only by try and error (not sure it is a good way to do that).

Hope it helps.

Regards,

Angus

 

[cbnsingram]

Thanks. I think I'll experiment with your #1 suggestion and fall back to 2 if I hit any snags.