POP3 issues with mailpit

skip · June 13, 2024, 6:19am

Used Zammad version: 6.3.1-1717572987.fd8871d4.jammy
Used Zammad installation type: package
Operating system: Ubuntu 22.04
Browser + version: Firefox 126.0.1 (64-bit)

Expected behavior:

Be able to fetch POP3 mails from local faux mail server Mailpit

Actual behavior:

Getting end of file reached when mailbox is empty

or
bad response: 1 %!d(float64=5836)
When there is a mail in the mailbox

image1057×271 10 KB

image444×850 21.2 KB

Steps to reproduce the behavior:

Install Mailpit on the Zammad server sudo bash < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/install.sh)
Create auth file for POP3
echo -e "user1:password1\nuser2:password2" > mailpit.auth
Launch mailpit with mailpit --pop3-auth-file ./mailpit.auth
Set up Zammad Email notification account with mailpit SMTP

image468×687 19.7 KB
- Host: localhost
- Port: 1025
- SSL Verification: no
Set up Email Channel in Zammad as shown above with
- Type: POP3
- Host: localhost
- User: user1
- Password: password1,
- SSL: No SSL
- Port: 1110

Try to set up the mailbox and get the EOF error

Logout from Zammad and send a recover password email. Receive the email in mailpit as shown above
Try again to set up the mail channel and get the bad response: 1 %!d(float64=5836) error

Any pointer in the right direction is very welcome

Best,
Skip

fliebe92 · June 13, 2024, 11:27am

Hi @skip. It seems that Mailpit is not compatible to the way how the Net::POP3 Ruby library is fetching mails.

More technical information: net-pop/lib/net/pop.rb at e8d0afe2773b9eb6a23c39e9e437f6fc0fc7c733 · ruby/net-pop · GitHub

This is the line that is shown in your screenshot.

fliebe92 · June 13, 2024, 11:30am

@skip Maybe it might be a good idea to ask in the Mailpit repository for help with that, not sure though.

skip · June 13, 2024, 1:09pm

Thank you very much @fliebe92!

So far I have fixed the bad response: 1 %!d(float64=5836) error with this PR @ mailpit

github.com/axllent/mailpit

Changed POP3 size output to show compatible size

axllent:develop ← antonionardella:develop

opened 01:01PM - 13 Jun 24 UTC

antonionardella

+2 -1

This commit makes sure that LIST shows an RFC1939 compatible size ``` LIST …+OK 1 messages (5833 octets) 1 5833 ``` Instead of ``` LIST +OK 5 messages (27300 octets) 1 %!d(float64=5461) 2 %!d(float64=5465) 3 %!d(float64=5350) 4 %!d(float64=5349) 5 %!d(float64=5675) ``` And fixes the `float64=5461` error of this issue https://github.com/axllent/mailpit/issues/311#issuecomment-2165453243

Now I am looking into the end of file reached error.

fliebe92 · June 13, 2024, 6:32pm

Hi @skip.

The end of file reached error comes from here: net-pop/lib/net/pop.rb at e8d0afe2773b9eb6a23c39e9e437f6fc0fc7c733 · ruby/net-pop · GitHub

But again, I don’t know what Mailpit is doing in this case, might be worth checking RFCs how POP3 should behave in such situations etc.

skip · June 13, 2024, 9:11pm

Thanks again for pointing me in the right direction!

Added full support for POP3 to Mailpit with this commit

Now I was able to add the POP3 account to Zammad

Time for more testing and debugging now!

fliebe92 · June 14, 2024, 8:58am

Hi @skip. Do you plan to create another pull request for Mailpit with those changes? Asking for a friend…

skip · June 17, 2024, 11:02am

Hello @fliebe92!

You can find the forked (and working) mailpit here:

There is still an open discussion with the maintainer you can follow here:

github.com/axllent/mailpit

POP3 end of file reached error

opened 02:37PM - 12 Jun 24 UTC

antonionardella

Hello, I am trying to set up mailpit to be used as moch email server for a st…aging installation of https://github.com/zammad/zammad according to their documentation here: https://admin-docs.zammad.org/en/latest/channels/email/index.html This to see if the email are sent and received correctly and do further testing in a staging environment. My issue is that once I set up mailpit and the pop3 connection parameters in zammad all I get is: `end of file reached` on Zammad's side and `ERRO[2024/06/12 13:20:15] [pop3] EOF` on mailpits side. I installed `mkcert` to create certificates and keys like so: ``` mkcert --install mkcert 10.0.10.52 ``` To generate certs for the IP of the test server Then a pop3 auth file which contains nothing but `user:pass` Then I start mailpit with `mailpit --pop3-auth-file ./mailpit.auth --pop3-tls-cert ./cert.pem --pop3-tls-key ./key.pem` What else could I try to make this work or debug it? Thanks

Once everything is clear and satisfying for all parties, it will be merged in the main project.

I hope your friend is happy for this contribution

fliebe92 · June 17, 2024, 1:20pm

Hi @skip. Thanks a lot! Let me know if there is something I could support with.

skip · June 19, 2024, 6:44am

Fixed with the latest 1.18.6 release

Now it works fine with Zammad

system · June 26, 2024, 6:45am

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