| Class | Rating | Complexity | Lines of code |
|---|---|---|---|
| GOSMTP\Mailer\Loader | 110 | 348 | |
| GOSMTP\Mailer\SMTPcom | 36 | 183 | |
| GoSMTP\Mailer\Maileroo | 34 | 152 | |
| GOSMTP\Mailer\Sendgrid | 33 | 160 | |
| GOSMTP\Mailer\Sendlayer | 32 | 151 | |
| GOSMTP\Mailer\Sparkpost | 32 | 166 | |
| GOSMTP\Mailer\Mailgun | 29 | 176 | |
| GOSMTP\Mailer\Postmark | 27 | 145 | |
| GOSMTP\Mailer\Sendinblue | 26 | 132 | |
| GOSMTP_PHPMailer | 10 | 46 | |
| GOSMTP\Mailer\SMTP | 10 | 99 | |
| GOSMTP\Mailer\Mail | 4 | 20 |