E-mail (em massa) não chega. Não está claro por que

Question

Por favor, tenha paciência enquanto tento explicar o problema da melhor maneira possível (inglês não é minha língua nativa).

Um de meus clientes oferece um programa de entretenimento online voltado para empresas cujos funcionários precisam trabalhar em casa devido à pandemia de Corona. Isso é transmitido ao vivo pelo YouTube. Cada show é feito sob medida para a empresa que o solicita.

Quando uma empresa se inscreve em uma feira, ela precisa enviar uma lista com os endereços de e-mail dos funcionários que desejam participar da feira online.MeuO servidor de e-mail envia um e-mail padrão (em nome do meu cliente) para cada funcionário com um pequeno texto apresentando o programa e um link para um stream do YouTube.

Fiz tudo o que pude para garantir que a correspondência chegasse:

Adicionei um registro SPF ao DNS do meu cliente para informar ao servidor de recebimento de e-mail que meu domínio está autorizado a enviar e-mails em nome do meu cliente. Adicionei um registro DKIM Adicionei um registro DMARC

Antes de enviar a campanha por e-mail, sempre peço ao meu servidor que envie uma amostra para mail-tester.com. Eu sempre obtenho uma pontuação perfeita de 10 em 10:

Mesmo assim, na maioria das vezes uma pequena percentagem do email enviado não chega. Mesmo que todos os e-mails tenham sido enviados para endereços de e-mail no mesmo domínio (do cliente). Atribuo isso às pessoas que excluem acidentalmente o e-mail ou talvez tenham um antivírus hiperativo em seus sistemas.

Enfim, ontem precisei enviar uma campanha por e-mail para os funcionários do cliente do meu cliente. Nenhum chegou. Tentei de novo e de novo, nada chegou. Não tenho ideia do porquê. Copiei uma parte das linhas relevantes do meu arquivo de log mail.info. Não sei exatamente como ler o arquivo de log, mas não vejo nenhum erro aparente.

Alterei os nomes de domínio da seguinte forma:

• onlineentertainment.com é a empresa do meu cliente
• mymailserver.com é meu servidor de e-mail
• destinatáriodomain.com é o nome de domínio da empresa para a qual estou tentando enviar e-mails.

Alguém pode ver o que pode estar acontecendo aqui?

Dec 16 23:54:37 enterprise postfix/pickup[39522]: 7B6595F979: uid=33 from=<[email protected]>
Dec 16 23:54:37 enterprise postfix/cleanup[2761]: 7B6595F979: message-id=<[email protected]>
Dec 16 23:54:37 enterprise postfix/qmgr[41828]: 7B6595F979: from=<[email protected]>, size=4113, nrcpt=1 (queue active)
Dec 16 23:54:37 enterprise postfix/pickup[39522]: D03835F97D: uid=33 from=<[email protected]>
Dec 16 23:54:37 enterprise postfix/cleanup[2761]: D03835F97D: message-id=<[email protected]>
Dec 16 23:54:37 enterprise postfix/qmgr[41828]: D03835F97D: from=<[email protected]>, size=4133, nrcpt=1 (queue active)
Dec 16 23:54:38 enterprise postfix/pickup[39522]: 313375F97E: uid=33 from=<[email protected]>
Dec 16 23:54:38 enterprise postfix/cleanup[2761]: 313375F97E: message-id=<[email protected]>
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: 313375F97E: from=<[email protected]>, size=4141, nrcpt=1 (queue active)
Dec 16 23:54:38 enterprise postfix/smtpd[3133]: connect from localhost[127.0.0.1]
Dec 16 23:54:38 enterprise postfix/smtpd[3133]: 4B5CC5F977: client=localhost[127.0.0.1]
Dec 16 23:54:38 enterprise postfix/cleanup[2761]: 4B5CC5F977: message-id=<[email protected]>
Dec 16 23:54:38 enterprise postfix/smtpd[3133]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: 4B5CC5F977: from=<[email protected]>, size=5132, nrcpt=1 (queue active)
Dec 16 23:54:38 enterprise amavis[34564]: (34564-15) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: 92QAoDnqQmRn, Hits: -2.099, size: 4622, queued_as: 4B5CC5F977, dkim_sd=202011:onlineentertainment.com, 808 ms
Dec 16 23:54:38 enterprise postfix/smtp[2762]: 7B6595F979: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.82, delays=0.01/0/0/0.81, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 4B5CC5F977)
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: 7B6595F979: removed
Dec 16 23:54:38 enterprise postfix/pickup[39522]: 877355F97F: uid=33 from=<[email protected]>
Dec 16 23:54:38 enterprise postfix/cleanup[2761]: 877355F97F: message-id=<[email protected]>
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: 877355F97F: from=<[email protected]>, size=4112, nrcpt=1 (queue active)
Dec 16 23:54:38 enterprise postfix/smtpd[2771]: 9D4475F979: client=localhost[127.0.0.1]
Dec 16 23:54:38 enterprise postfix/cleanup[2761]: 9D4475F979: message-id=<[email protected]>
Dec 16 23:54:38 enterprise postfix/smtpd[2771]: disconnect from localhost[127.0.0.1] ehlo=1 mail=3 rcpt=3 data=3 noop=1 quit=1 commands=12
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: 9D4475F979: from=<[email protected]>, size=5162, nrcpt=1 (queue active)
Dec 16 23:54:38 enterprise amavis[58567]: (58567-03) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: MIeaBhcawP2y, Hits: -2.099, size: 4642, queued_as: 9D4475F979, dkim_sd=202011:onlineentertainment.com, 779 ms
Dec 16 23:54:38 enterprise postfix/smtp[3129]: D03835F97D: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.81, delays=0.01/0.01/0/0.78, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 9D4475F979)
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: D03835F97D: removed
Dec 16 23:54:38 enterprise postfix/pickup[39522]: DE1525F980: uid=33 from=<[email protected]>
Dec 16 23:54:38 enterprise postfix/cleanup[2761]: DE1525F980: message-id=<[email protected]>
Dec 16 23:54:38 enterprise postfix/qmgr[41828]: DE1525F980: from=<[email protected]>, size=4109, nrcpt=1 (queue active)
Dec 16 23:54:39 enterprise postfix/smtpd[3133]: connect from localhost[127.0.0.1]
Dec 16 23:54:39 enterprise postfix/smtpd[3133]: 2A03F5F97D: client=localhost[127.0.0.1]
Dec 16 23:54:39 enterprise postfix/cleanup[2761]: 2A03F5F97D: message-id=<[email protected]>
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: 2A03F5F97D: from=<[email protected]>, size=5174, nrcpt=1 (queue active)
Dec 16 23:54:39 enterprise amavis[34564]: (34564-16) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: QfInV79FpesV, Hits: -2.099, size: 4650, queued_as: 2A03F5F97D, dkim_sd=202011:onlineentertainment.com, 856 ms
Dec 16 23:54:39 enterprise postfix/smtp[2762]: 313375F97E: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.99, delays=0.01/0.11/0.01/0.86, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 2A03F5F97D)
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: 313375F97E: removed
Dec 16 23:54:39 enterprise postfix/pickup[3151]: 5BE7C5F981: uid=33 from=<[email protected]>
Dec 16 23:54:39 enterprise postfix/cleanup[2761]: 5BE7C5F981: message-id=<[email protected]>
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: 5BE7C5F981: from=<[email protected]>, size=4108, nrcpt=1 (queue active)
Dec 16 23:54:39 enterprise postfix/smtpd[2771]: connect from localhost[127.0.0.1]
Dec 16 23:54:39 enterprise postfix/smtpd[2771]: 8047B5F97E: client=localhost[127.0.0.1]
Dec 16 23:54:39 enterprise postfix/cleanup[2761]: 8047B5F97E: message-id=<[email protected]>
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: 8047B5F97E: from=<[email protected]>, size=5129, nrcpt=1 (queue active)
Dec 16 23:54:39 enterprise amavis[58567]: (58567-04) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: abrUz0K5KSll, Hits: -2.099, size: 4621, queued_as: 8047B5F97E, dkim_sd=202011:onlineentertainment.com, 882 ms
Dec 16 23:54:39 enterprise postfix/smtp[3129]: 877355F97F: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.99, delays=0.01/0.1/0/0.88, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 8047B5F97E)
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: 877355F97F: removed
Dec 16 23:54:39 enterprise postfix/pickup[3151]: CB0395F982: uid=33 from=<[email protected]>
Dec 16 23:54:39 enterprise postfix/cleanup[2761]: CB0395F982: message-id=<[email protected]>
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: CB0395F982: from=<[email protected]>, size=4124, nrcpt=1 (queue active)
Dec 16 23:54:39 enterprise postfix/smtp[3134]: 4B5CC5F977: to=<[email protected]>, relay=recipientdomain-com.mail.protection.outlook.com[123.12.9.36]:25, delay=1.6, delays=0.01/0.01/0.27/1.3, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> [InternalId=29476360558290, Hostname=AM6PR08MB4674.eurprd08.prod.outlook.com] 15208 bytes in 0.138, 107.008 KB/sec Queued mail for delivery)
Dec 16 23:54:39 enterprise postfix/qmgr[41828]: 4B5CC5F977: removed
Dec 16 23:54:40 enterprise postfix/smtpd[3133]: 090B75F977: client=localhost[127.0.0.1]
Dec 16 23:54:40 enterprise postfix/cleanup[2761]: 090B75F977: message-id=<[email protected]>
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: 090B75F977: from=<[email protected]>, size=5126, nrcpt=1 (queue active)
Dec 16 23:54:40 enterprise amavis[34564]: (34564-16-2) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: 9OD8VAmXIwx9, Hits: -2.099, size: 4618, queued_as: 090B75F977, dkim_sd=202011:onlineentertainment.com, 859 ms
Dec 16 23:54:40 enterprise postfix/smtp[2762]: DE1525F980: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=2, delay=1.1, delays=0.01/0.28/0/0.86, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 090B75F977)
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: DE1525F980: removed
Dec 16 23:54:40 enterprise postfix/pickup[3151]: 46D3D5F980: uid=33 from=<[email protected]>
Dec 16 23:54:40 enterprise postfix/cleanup[2761]: 46D3D5F980: message-id=<[email protected]>
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: 46D3D5F980: from=<[email protected]>, size=4104, nrcpt=1 (queue active)
Dec 16 23:54:40 enterprise postfix/smtpd[2771]: 6D3E55F97F: client=localhost[127.0.0.1]
Dec 16 23:54:40 enterprise postfix/cleanup[2761]: 6D3E55F97F: message-id=<[email protected]>
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: 6D3E55F97F: from=<[email protected]>, size=5121, nrcpt=1 (queue active)
Dec 16 23:54:40 enterprise amavis[58567]: (58567-04-2) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: HWq-d2xorNb9, Hits: -2.099, size: 4617, queued_as: 6D3E55F97F, dkim_sd=202011:onlineentertainment.com, 917 ms
Dec 16 23:54:40 enterprise postfix/smtp[3129]: 5BE7C5F981: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=2, delay=1.1, delays=0.02/0.16/0/0.92, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 6D3E55F97F)
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: 5BE7C5F981: removed
Dec 16 23:54:40 enterprise postfix/smtp[3139]: 9D4475F979: to=<[email protected]>, relay=recipientdomain-com.mail.protection.outlook.com[123.12.10.36]:25, delay=2, delays=0.01/0.02/0.21/1.8, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> [InternalId=53919019439079, Hostname=DB6PR0801MB2088.eurprd08.prod.outlook.com] 14660 bytes in 0.243, 58.906 KB/sec Queued mail for delivery)
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: 9D4475F979: removed
Dec 16 23:54:40 enterprise postfix/smtp[3134]: 090B75F977: to=<[email protected]>, relay=recipientdomain-com.mail.protection.outlook.com[123.12.8.36]:25, delay=0.65, delays=0.01/0/0.07/0.57, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> [InternalId=7189775259089, Hostname=VI1PR08MB3775.eurprd08.prod.outlook.com] 14799 bytes in 0.136, 105.753 KB/sec Queued mail for delivery)
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: 090B75F977: removed
Dec 16 23:54:40 enterprise postfix/pickup[3151]: B76765F979: uid=33 from=<[email protected]>
Dec 16 23:54:40 enterprise postfix/cleanup[2761]: B76765F979: message-id=<[email protected]>
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: B76765F979: from=<[email protected]>, size=4148, nrcpt=1 (queue active)
Dec 16 23:54:40 enterprise postfix/smtpd[3133]: EE50E5F977: client=localhost[127.0.0.1]
Dec 16 23:54:40 enterprise postfix/cleanup[2761]: EE50E5F977: message-id=<[email protected]>
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: EE50E5F977: from=<[email protected]>, size=5145, nrcpt=1 (queue active)
Dec 16 23:54:40 enterprise amavis[34564]: (34564-16-3) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: 2t01vbNEsLgw, Hits: -2.099, size: 4633, queued_as: EE50E5F977, dkim_sd=202011:onlineentertainment.com, 937 ms
Dec 16 23:54:40 enterprise postfix/smtp[2762]: CB0395F982: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=3, delay=1.2, delays=0.01/0.22/0/0.94, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as EE50E5F977)
Dec 16 23:54:40 enterprise postfix/qmgr[41828]: CB0395F982: removed
Dec 16 23:54:41 enterprise postfix/smtp[3153]: 8047B5F97E: to=<[email protected]>, relay=recipientdomain-com.mail.protection.outlook.com[123.12.10.36]:25, delay=1.6, delays=0.01/0.02/0.17/1.3, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> [InternalId=39006892988455, Hostname=AM7PR08MB5334.eurprd08.prod.outlook.com] 14696 bytes in 0.072, 197.088 KB/sec Queued mail for delivery)
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: 8047B5F97E: removed
Dec 16 23:54:41 enterprise postfix/pickup[3151]: 3E6035F981: uid=33 from=<[email protected]>
Dec 16 23:54:41 enterprise postfix/cleanup[2761]: 3E6035F981: message-id=<[email protected]>
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: 3E6035F981: from=<[email protected]>, size=4116, nrcpt=1 (queue active)
Dec 16 23:54:41 enterprise postfix/smtpd[2771]: 4EAFD5F97E: client=localhost[127.0.0.1]
Dec 16 23:54:41 enterprise postfix/cleanup[2761]: 4EAFD5F97E: message-id=<[email protected]>
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: 4EAFD5F97E: from=<[email protected]>, size=5115, nrcpt=1 (queue active)
Dec 16 23:54:41 enterprise amavis[58567]: (58567-04-3) Passed CLEAN {RelayedOpenRelay}, [127.0.0.1] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: 18YuKNQ-nYvh, Hits: -2.099, size: 4613, queued_as: 4EAFD5F97E, dkim_sd=202011:onlineentertainment.com, 868 ms
Dec 16 23:54:41 enterprise postfix/smtp[3129]: 46D3D5F980: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, conn_use=3, delay=1.1, delays=0.01/0.17/0/0.87, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 4EAFD5F97E)
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: 46D3D5F980: removed
Dec 16 23:54:41 enterprise postfix/smtp[3145]: 2A03F5F97D: to=<[email protected]>, relay=recipientdomain-com.mail.protection.outlook.com[123.12.8.36]:25, delay=2.4, delays=0.01/0.02/0.1/2.3, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> [InternalId=28737626183423, Hostname=AM0PR08MB5073.eurprd08.prod.outlook.com] 14768 bytes in 0.153, 94.061 KB/sec Queued mail for delivery)
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: 2A03F5F97D: removed
Dec 16 23:54:41 enterprise postfix/pickup[3151]: B708C5F980: uid=33 from=<[email protected]>
Dec 16 23:54:41 enterprise postfix/cleanup[2761]: B708C5F980: message-id=<[email protected]>
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: B708C5F980: from=<[email protected]>, size=4131, nrcpt=1 (queue active)
Dec 16 23:54:41 enterprise postfix/smtpd[3133]: D806A5F97D: client=localhost[127.0.0.1]
Dec 16 23:54:41 enterprise postfix/cleanup[2761]: D806A5F97D: message-id=<[email protected]>
Dec 16 23:54:41 enterprise postfix/qmgr[41828]: D806A5F97D: from=<[email protected]>, size=5181, nrcpt=1 (queue active)