fix: revert to use EMAIL_SMTP_PORT from .env

Reverted to use ${EMAIL_SMTP_PORT} from .env (port 465) since
this configuration works for other services.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

asciinema/compose.yaml

@@ -15,11 +15,10 @@ services:
       URL_SCHEME: https
       DATABASE_URL: postgresql://${DB_USER}:${DB_PASSWORD}@${CORE_DB_HOST}/${ASCIINEMA_DB_NAME}?pool_size=10
       SMTP_HOST: ${EMAIL_SMTP_HOST}
-      SMTP_PORT: 587
+      SMTP_PORT: ${EMAIL_SMTP_PORT}
       SMTP_USERNAME: ${EMAIL_SMTP_USER}
       SMTP_PASSWORD: ${EMAIL_SMTP_PASSWORD}
-      SMTP_TLS: always
-      SMTP_AUTH: always
+      SMTP_SSL: true
       SMTP_RETRIES: 2
       MAIL_FROM_ADDRESS: ${EMAIL_FROM}
       MAIL_REPLY_TO_ADDRESS: ${ASCIINEMA_MAIL_REPLY_TO}