Post (send directly from the server) on the server with 1C-Bitrix.or through SMTP.By default 1C-Bitrix does not send a mail, when using SMTP there are its limitations, by call_w letters, about which they usually silence, therefore in the process will be set up spf, dkim, dmars, Rdns, after the settings check on getting a mail in the spam service https://www.mail-tester.com.
“Example: Limited Yandex”
A letter sent through the website may have no more than 50 recipients.A letter sent through the SMTP protocol may have no more than 35 recipients.All letters sent from one mailbox per day may have no more than 3,000 recipients.Letters sent from all the boxes of one domain per day may have no more than 5,000 recipients.The setting is only available on VPS or a dedicated server (Linux).As a result of the setting will be included logging of all sent letters (time, from where and to whom, status of sending).This setting will be interesting for Bitrix24 , when adding mail boxes to the CRM mail is not sent through SMTP from different mail boxes , the quark will help to eliminate the problem without buying expensive modules, and the mail receipt will remain on a convenient service for you: Yandex, mail .
“Example: Limited Yandex”
A letter sent through the website may have no more than 50 recipients.A letter sent through the SMTP protocol may have no more than 35 recipients.All letters sent from one mailbox per day may have no more than 3,000 recipients.Letters sent from all the boxes of one domain per day may have no more than 5,000 recipients.The setting is only available on VPS or a dedicated server (Linux).As a result of the setting will be included logging of all sent letters (time, from where and to whom, status of sending).This setting will be interesting for Bitrix24 , when adding mail boxes to the CRM mail is not sent through SMTP from different mail boxes , the quark will help to eliminate the problem without buying expensive modules, and the mail receipt will remain on a convenient service for you: Yandex, mail .