On 10.04.2025 09:06, Jugendbewerb FF Kirchbach wrote:

does anyone know if Roundcube has an upper limit for number of e-mail addresses when sending e-mails?

Yes, but SMTP server usually have one too.

// Maximum number of recipients per message (including To, Cc, Bcc). // Default: 0 (no limit) $config['max_recipients'] = 0;

// Maximum number of recipients per message excluding Bcc header. // This is a soft limit, which means we only display a warning. // Default: 5 $config['max_disclosed_recipients'] = 5;

// Maximum allowed number of members of an address group. // Default: 0 (no limit) // If 'max_recipients' is set this value should be less or equal $config['max_group_members'] = 0;