| Class | Rating | Complexity | Lines of code |
|---|---|---|---|
| GOSMTP\Mailer\Loader | 88 | 286 | |
| GOSMTP\Mailer\SMTPcom | 34 | 178 | |
| GOSMTP\Mailer\Sparkpost | 32 | 166 | |
| GOSMTP\Mailer\Sendgrid | 30 | 150 | |
| GOSMTP\Mailer\Mailgun | 29 | 176 | |
| GOSMTP\Mailer\Sendlayer | 27 | 134 | |
| GOSMTP\Mailer\Postmark | 26 | 142 | |
| GOSMTP\Mailer\Sendinblue | 26 | 131 | |
| GOSMTP\Mailer\SMTP | 9 | 99 | |
| GOSMTP\Mailer\Mail | 4 | 20 | |
| GOSMTP_PHPMailer | 2 | 13 |