dartokloning/EmailValidation.sh

EmailValidation.sh · 1.5 KiB · Bash Raw

#!/bin/bash

#Email Format Validation:
#- Uses a regular expression to check if the email address format is valid.

#Domain Existence Check:
#- Uses the dig command to look up the domain's DNS records.
#- Ensures the domain has a valid DNS record.

#Input and Validation:
#- Prompts the user to enter an email address.
#- Extracts the domain from the email address.
#- Validates the email format and checks if the domain exists.
#- Displays appropriate messages based on the validation and check results.

# Function to validate the email format
function validate_email_format() {
    local email="$1"
    
    if [[ "$email" =~ ^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$ ]]; then
        return 0
    else
        echo "Invalid email format."
        return 1
    fi
}

# Function to check if the email domain exists
function check_domain_exists() {
    local domain="$1"
    
    if dig +short "$domain" | grep -q '^[0-9]'; then
        return 0
    else
        echo "Domain does not exist."
        return 1
    fi
}

# Get email input from the user
read -p "Enter email: " email

# Extract domain from email
domain=$(echo "$email" | awk -F '@' '{print $2}')

# Validate email format and check domain existence
if validate_email_format "$email"; then
    if check_domain_exists "$domain"; then
        echo "Email is valid and domain exists."
    else
        echo "Email is valid, but domain does not exist."
    fi
else
    echo "Invalid email format. Please try again."
fi

1	#!/bin/bash
2
3	#Email Format Validation:
4	#- Uses a regular expression to check if the email address format is valid.
5
6	#Domain Existence Check:
7	#- Uses the dig command to look up the domain's DNS records.
8	#- Ensures the domain has a valid DNS record.
9
10	#Input and Validation:
11	#- Prompts the user to enter an email address.
12	#- Extracts the domain from the email address.
13	#- Validates the email format and checks if the domain exists.
14	#- Displays appropriate messages based on the validation and check results.
15
16	# Function to validate the email format
17	function validate_email_format() {
18	local email="$1"
19
20	if [[ "$email" =~ ^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$ ]]; then
21	return 0
22	else
23	echo "Invalid email format."
24	return 1
25	fi
26	}
27
28	# Function to check if the email domain exists
29	function check_domain_exists() {
30	local domain="$1"
31
32	if dig +short "$domain" \| grep -q '^[0-9]'; then
33	return 0
34	else
35	echo "Domain does not exist."
36	return 1
37	fi
38	}
39
40	# Get email input from the user
41	read -p "Enter email: " email
42
43	# Extract domain from email
44	domain=$(echo "$email" \| awk -F '@' '{print $2}')
45
46	# Validate email format and check domain existence
47	if validate_email_format "$email"; then
48	if check_domain_exists "$domain"; then
49	echo "Email is valid and domain exists."
50	else
51	echo "Email is valid, but domain does not exist."
52	fi
53	else
54	echo "Invalid email format. Please try again."
55	fi
56