1 RCPT "requires PRT" and another RCPT "mail action okay" in same transaction

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scngannet
Posts: 3
Joined: Tue Apr 26, 2022 10:11 am

1 RCPT "requires PRT" and another RCPT "mail action okay" in same transaction

Post by scngannet »

Hi ME Team,
Any idea why and how this happen in 1 single transaction mail ? First RCPT show "Requires PTR" while 2nd RCPT show "Okay".

UserA didn't receive the mail while UserB received the mail.

02/17/22 16:54:32 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP 220 mail-.com *** We do not authorize the use of this system to transport unsolicited email and/or bulk e-mail. *** 136 0
02/17/22 16:54:32 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP EHLO EHLO mail.sender 250-mail-.com [mail.sender IP], this server offers 7 extensions 344 27
02/17/22 16:54:33 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP STARTTLS 24 10
02/17/22 16:54:33 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP STARTTLS STARTTLS 24 10
02/17/22 16:54:33 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP EHLO EHLO mail.sender 250-mail-.com [mail.sender IP], this server offers 7 extensions 208 27
02/17/22 16:54:34 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP MAIL MAIL FROM:<sender@senderdomain.com> SIZE=90417 250 Requested mail action okay, completed 43 50
02/17/22 16:54:36 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP RCPT RCPT TO:<userA@receiverdomain.com> 554 This server requires PTR for unauthenticated connections. 63 35
02/17/22 16:54:39 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP RCPT RCPT TO:<userB@receiverdomain.com> 250 Requested mail action okay, completed 43 32
02/17/22 16:54:39 SMTP-IN B6109B9BF5BE4AF7A29544AEA5166936.MAI 11560 mail.sender IP DATA DATA 354 Start mail input; end with <CRLF>.<CRLF> 46 6


Trace: Tracing message with Message ID [B6109B9BF5BE4AF7A29544AEA5166936.MAI] from the SMTP Inbound Queue

Status: Message ID [B6109B9BF5BE4AF7A29544AEA5166936.MAI] was routed by the MTA from the SMTP Inbound Queue to 1 destination queue(s)

02/17/22 16:54:44 Queue Route: Message ID [B6109B9BF5BE4AF7A29544AEA5166936.MAI] was routed by the MTA from the SMTP Inbound Queue to the Postoffice Connector (SF) Outbound Queue with a Message ID of [16B9525D0CD14844B162F76A113EEA3E.MAI]

02/17/22 16:54:44 [16B9525D0CD14844B162F76A113EEA3E.MAI] Delivered message from [SMTP:sender@senderdomain.com] to PO=receiverdomain.com MBX=userB FLD=\Inbox

MailEnable-Ian
Site Admin
Posts: 9738
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: 1 RCPT "requires PRT" and another RCPT "mail action okay" in same transaction

Post by MailEnable-Ian »

Hi,

Looks like the second recipient mailbox may have whitelisted the sending domain or sender address. Check the associated SMTP debug log file for more clues. We have emulated the same scenario on our end and it works for the second RCPT to.
Regards,

Ian Margarone
MailEnable Support

scngannet
Posts: 3
Joined: Tue Apr 26, 2022 10:11 am

Re: 1 RCPT "requires PRT" and another RCPT "mail action okay" in same transaction

Post by scngannet »

Hi Ian,
Thanks for the prompt reply. Weird thing is both userA and userB are from same domain name/postoffice.
I've check their mailbox level setting, dont have anything different from each other. All setting are done on postoffice level.

02/17/22 16:54:36 ME-E0114: [11560] Recipient Denied: (IP) has no PTR. Result 9501. <- i assume this is the log for userA
02/17/22 16:54:36 ME-I0101: [11560] Local Delivery: Address ([SMTP:userB@receiverdomain.com]) is local. <- userB show success

MailEnable-Ian
Site Admin
Posts: 9738
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: 1 RCPT "requires PRT" and another RCPT "mail action okay" in same transaction

Post by MailEnable-Ian »

Hi,

Can you log a support ticket under the category of "Upgrade" and provide full copies of the SMTP activity and debug log files for that date/time of your tests.
Regards,

Ian Margarone
MailEnable Support

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