Email Client Configuration & Dovecot Quota/Monitoring Guide for DirectAdmin Users

1. Configuring Email on iPhone (Mail App)

To add your email account to the iPhone Mail app:

1. Open Settings → Accounts & Passwords → Add Account → Other → Add Mail Account
2. Enter:
   • Name
   • Email: [email protected]
   • Password
   • Description
3. Tap Next

Incoming Mail Server (IMAP)

Host Name: mail.domain.com
User Name: [email protected]
Password: yourpassword

Outgoing Mail Server (SMTP)

Use the same settings as incoming:

Host Name: mail.domain.com
User Name: [email protected]
Password: yourpassword

Note: SMTP password is required.

Enable SSL for SMTP

Go to:

Settings → Accounts → [email protected] → Account → SMTP → Primary Server

Ensure:

• Use SSL: ON
• Authentication: Password
• Server Port: 587

Enable SSL for IMAP

Go back to the account page → Advanced

• Use SSL: ON
• Authentication: Password
• IMAP Path Prefix: /
• Server Port: 993

---

2. Configuring Thunderbird Email Client

1. Open Tools → Account Settings → Account Actions → Add Mail Account
2. Enter:
   • Name
   • Email: [email protected]
   • Password
3. Click Continue
4. Click Manual config

Recommended Settings

Type	Protocol	Port	SSL	Auth
Incoming	IMAP	993	SSL/TLS	Normal password
Outgoing	SMTP	587	STARTTLS	Normal password

Username (both incoming & outgoing): [email protected]

Use the hostname provided by your hosting provider (mail.domain.com or server.hostname.com).

If you see SSL warnings, you may accept them—usually the certificate hostname does not match the server name used.

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3. Configuring Gmail (mail.google.com) to Fetch Emails via POP

1. Login to https://mail.google.com
2. Go to Settings → Accounts and Import
3. Under Check mail from other accounts, click Add a mail account
4. Enter [email protected]
5. Select Import email from my other account (POP3)

POP Settings

Option	Value
Username	[email protected]
Password	yourpassword
POP Server	mail.domain.com
Port	995
SSL	ON

Click Add Account.

Sending mail as [email protected]

Choose Yes when asked:

Would you like to be able to send mail as [email protected]?

Recommended to avoid SPF issues.

SMTP Settings

Option	Value
SMTP Server	mail.domain.com
Username	[email protected]
Password	yourpassword
Port	587
Security	TLS

Enter the verification code sent to your mailbox.

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4. Enabling Dovecot LMTP Quota Warning Notifications

Dovecot can automatically notify users when their mailbox reaches 80%, 95%, or 100% of quota.

Step 1: Create quota warning config

File: /etc/dovecot/conf.d/91-quota-warning.conf

Dovecot 2.4.x:

quota "" {
  warning warn-100 {
    quota_storage_percentage = 100
    execute quota-warning {
      args = 100 %{user}
    }
  }
  warning warn-95 {
    quota_storage_percentage = 95
    execute quota-warning {
      args = 95 %{user}
    }
  }
  warning warn-80 {
    quota_storage_percentage = 80
    execute quota-warning {
      args = 80 %{user}
    }
  }
}

service quota-warning {
  executable = script /usr/local/bin/quota-warning.sh
  user = root
  unix_listener quota-warning {
    user = mail
    group = mail
    mode = 0660
  }
}

Dovecot 2.3.x:

plugin {
  quota_warning = storage=100%% quota-warning 100 %u %d
  quota_warning2 = storage=95%% quota-warning 95 %u %d
  quota_warning3 = storage=80%% quota-warning 80 %u %d
}
service quota-warning {
  executable = script /usr/local/bin/quota-warning.sh
  user = root
  unix_listener quota-warning {
    user = mail
    mode=0666
  }
}

---

Step 2: Create quota-warning.sh

File: /usr/local/bin/quota-warning.sh

Dovecot 2.4.x:

PERCENT=$1
USER=$2
FROM=$USER

cat << EOF | /usr/libexec/dovecot/dovecot-lda -d $USER -o "quota_enforce=no"
From: $FROM
Subject: Email Quota Usage: $PERCENT%

This is an automated notification letting you know that your account:
$USER

has used $PERCENT% of its available space.

EOF

Dovecot 2.3.x:

#!/bin/bash
PERCENT=$1
USER=$2
FROM=$USER

cat << EOF | /usr/libexec/dovecot/dovecot-lda -d $USER -o "plugin/quota=maildir:User quota:noenforcing"
From: $FROM
Subject: Email Quota Usage: $PERCENT%

This is an automated notification letting you know that your account:
$USER

has used $PERCENT% of its available space.

EOF

---

Step 3: Make script executable

chmod 0755 /usr/local/bin/quota-warning.sh

Step 4: Restart Dovecot

systemctl restart dovecot

---

5. Checking Last Login for All Email Accounts

Create script: /root/last_login.sh

#!/bin/sh
DAUSER=*
DOMAIN=*
EMLUSER=*

LOGIN_CACHE=/tmp/last_login.cache
echo -n '' > $LOGIN_CACHE
chmod 600 $LOGIN_CACHE

for c in `ls /home/$DAUSER/imap/$DOMAIN/$EMLUSER/Maildir/dovecot.index.log`; do
{
       LL=`stat $c | grep 'Change: ' | cut -d' ' -f2,3`
       U=`echo $c | cut -d/ -f3`
       D=`echo $c | cut -d/ -f5`
       E=`echo $c | cut -d/ -f6`
       echo "$LL=user=$U&domain=$D&email=$E" >> $LOGIN_CACHE
};
done;

cat $LOGIN_CACHE | sort -n
rm -f $LOGIN_CACHE

exit 0;

Run it:

cd /root
chmod 755 last_login.sh
./last_login.sh

To show only the oldest 10 accounts:

./last_login.sh | head -n 10

Output example:

2019-10-07 01:31:08=user=fred&domain=fred.com&email=sales

Note: This checks the timestamp of dovecot.index.log, which updates only when activity occurs—not during idle IMAP sessions.