Wrong sender email address when using Docker image

[gunzino]

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Steps to reproduce

1. Install nextcloud from Docker - using 'nextcloud' image
2. Configure SMTP
3. Send testing mail

Expected behaviour

Mail should arrive

Actual behaviour

A problem occurred while sending the email. Please revise your settings. (Error: Address in mailbox given [cloud@gunzo.eu@localhost.localdomain] does not comply with RFC 2822, 3.6.2.)

Server configuration

Operating system: Docker

Web server: Apache

Database: MariaDB

PHP version: From docker image

Nextcloud version: 20.0.5

Updated from an older Nextcloud/ownCloud or fresh install: fresh install

Where did you install Nextcloud from: Docker

Config.php:
'mail_smtpmode' => 'smtp',
'mail_smtphost' => 'smtp.eu.mailgun.org',
'mail_smtpport' => '587',
'mail_smtpsecure' => 'tls',
'mail_smtpauth' => 1,
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpname' => 'postmaster@gunzo.eu',
'mail_smtppassword' => 'xxxxx',
'mail_from_address' => 'cloud',
'mail_domain' => 'gunzo.eu',

docker-compose.xml:

version: '2'

services:
  db:
    image: mariadb
    restart: always
    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
    volumes:
      - ./db:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=nextcloud654
      - MYSQL_PASSWORD=xxx
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud

  app:
    image: nextcloud
    restart: always
    ports:
      - 8092:80
    links:
      - db
    volumes:
      - ./data:/var/www/html
    environment:
      - MYSQL_PASSWORD=xxx
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
      - MYSQL_HOST=db
      - SMTP_HOST=smtp.eu.mailgun.org
      - SMTP_SECURE=tls
      - SMTP_PORT=587
      - SMTP_AUTHTYPE=LOGIN
      - SMTP_NAME=postmaster@gunzo.eu
      - SMTP_PASSWORD=xxxx
      - MAIL_FROM_ADDRESS=cloud@gunzo.eu
      - MAIL_DOMAIN=gunzo.eu

[ngrigoriev]

Sorry, why this one got closed? This is exactly the problem I have with the fresh install of Nextcloud: "A problem occurred while sending the email. Please revise your settings. (Error: Address in mailbox given [nextcloud@@localhost.localdomain] does not comply with RFC 2822, 3.6.2.

[ngrigoriev]

Although this issue was closed for unknown reason, I think I have got rid of this problem with my installation using the following settings:

nextcloud:
  host: "nextcloud.<my-domain>"
  mail:
    enabled: true
    domain: "<my-domain>"
    fromAddress: "nextcloud"
    smtp:
      host: "<my-smtp-relay>"
      secure: "ssl"
      port: 465
  extraEnv:
    - name: NEXTCLOUD_HOSTNAME
      value: "nextcloud.<my-domain>"
    - name: OVERWRITEHOST
      value: "nextcloud.<my-domain>"
    - name: OVERWRITEPROTOCOL
      value: "https"

I was able to send the test email properly.

[vitobotta]

I've had this issue for ages. I upgraded to v23 and there's still the same issue.

[Adi-18]

I've the same problem right now. The additional @localhost.localdomain gives me the problem.

[alexisindesign]

Same here.
The issue persists.

[alexisindesign]

After reading docs thoroughly, was able to fix the issue.

docker-compose config:

    environment:
      # Mail config
      - MAIL_DOMAIN=mydomain.com
      - SMTP_HOST=mail.mydomain.com
      - SMTP_SECURE=ssl
      - SMTP_PORT=465
      - SMTP_AUTHTYPE=login
      - SMTP_NAME=noreply@mydomain.com
      - SMTP_PASSWORD=*******
      - MAIL_FROM_ADDRESS=noreply

[tcitworld]

Yeah, the issue is now more about Nextcloud checking for invalid configuration before trying to send the email.

[Adi-18]

MAIL_FROM_ADDRESS=noreply

I see the misinterpretation of MAIL_FROM_ADDRESS: It suggest to type "mail@domain.tld ". Could it be?

[jordan-bravo]

+1 same issue here on Nextcloud 23.0.3.

In Settings -> Basic Settings, under Email Server when I click "Send email" to test and verify settings, it shows this error: Address in mailbox given [<user@mydomain.com>@localhost.localdomain] does not comply with RFC 2822, 3.6.2.) where <user@mydomain.com> is my username and domain name.

[nawordar]

MAIL_FROM_ADDRESS=noreply

I see the misinterpretation of MAIL_FROM_ADDRESS: It suggest to type "mail@domain.tld ". Could it be?

Yep. In getDefaultEmailAddress() clearly mail_from_address is used only for the user part of e-mail. This is extremely confusing. IMO that variable should be deprecated and replaced with one with a clearer name

Also, I don't think it is a good idea to just fallback to localhost.localdomain. If validating e-mail address failed, something is clearly wrong and an error should be produced.

[nawordar]

@szaimen The getDefaultEmailAddress() function hasn't been changed in NC 25, so there is no way this has been solved.

This isn't really a bug, but an issue with:

• incorrect variable name — MAIL_FROM_ADDRESS should contain only the user part, not the whole address, as the name suggests,
• error handling — getDefaultEmailAddress() should not fallback to a default value when validating failed, but raise an exception.

In OP's case, environment variable contains the full address cloud@gunzo.eu and overrides the valid mail_from_address variable in config.php. Removing the environment variable should be enough to fix the OP's problem, but the issue with communicating what went wrong still persists.

[tcitworld]

Can we split the two then, the first part should be an issue in nextcloud/docker, or use nextcloud/docker#1187, and this issue should be renamed to handle the second part.

[szaimen]

Can we split the two then, the first part should be an issue in nextcloud/docker, or use nextcloud/docker#1187, and this issue should be renamed to handle the second part.

sounds good!