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oppi.li
1package email
2
3import (
4 "fmt"
5 "net"
6 "regexp"
7 "strings"
8
9 "github.com/resend/resend-go/v2"
10)
11
12type Email struct {
13 From string
14 To string
15 Subject string
16 Text string
17 Html string
18 APIKey string
19}
20
21func SendEmail(email Email) error {
22 client := resend.NewClient(email.APIKey)
23 _, err := client.Emails.Send(&resend.SendEmailRequest{
24 From: email.From,
25 To: []string{email.To},
26 Subject: email.Subject,
27 Text: email.Text,
28 Html: email.Html,
29 })
30 if err != nil {
31 return fmt.Errorf("error sending email: %w", err)
32 }
33 return nil
34}
35
36func IsValidEmail(email string) bool {
37 // Basic length check
38 if len(email) < 3 || len(email) > 254 {
39 return false
40 }
41
42 // Regular expression for email validation (RFC 5322 compliant)
43 pattern := `^[a-zA-Z0-9.!#$%&'*+/=?^_\x60{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$`
44
45 // Compile regex
46 regex := regexp.MustCompile(pattern)
47
48 // Check if email matches regex pattern
49 if !regex.MatchString(email) {
50 return false
51 }
52
53 // Split email into local and domain parts
54 parts := strings.Split(email, "@")
55 domain := parts[1]
56
57 mx, err := net.LookupMX(domain)
58 if err != nil || len(mx) == 0 {
59 return false
60 }
61
62 return true
63}