Hi,
Thanks for the info!
Please check that customer environments has setup according to this specification here:
https://www.hansamanuals.com/main/mailnumber___60012/theconf___85/manuals/version___85/langcode___RU/hwconvindex.htm?shortcode=HW0602SETTINGUP_External_Mail_SMTP
Hopefully this will solve the issue!
Brgds
Rasmus