stat=Deferred: 452 4.5.3 Too many recipients (AS780090)
From further research, it appears that Office 365 servers are picky with new servers, and they require them being run long enough to gain a good reputation. A lot of people complain about this. Email will often be deferred.
So I switched ip addresses for my new mal server. with another email server I have, that only sends out a small amount of email every often.
Voila. Now my new mail server has no problems with Microsoft servers. No matter how much email is sent out.
Office365のメールサーバは、新しいメールサーバに強い規制をかける？
エラーは以下の通り。
(host メールサーバー名.mail.protection.outlook.com [23.xx.xx.xx] said: 452 4.5.3 Too many recipients (xxxxxx)[xxxJPN01.prod.protection.outlook.com] (in reply to RCPT TO command))
という感じでメールキューがたまりまくる。
当社のメールサーバー(sendmail)のログに次の内容があり、
A社のメールサーバーは当社からのメールを一件ずつしか受領ていない様子です。---ログ--- relay=一部伏字.ction.outlook.com. [A社のメールサーバーIP], dsn=4.5.3, stat=Deferred: 452 4.5.3 Too many recipients (AS780090)Redirecting 2016
I kind of lost the original thread but I think you are looking for this
solution.In your sendmail.mc stick these in:
define(`SMTP_MAILER_MAXRCPTS', `1')dnl define(`RELAY_MAILER_MAXRCPTS', `1')dnlThose will make sendmail queue them out one at a time rather than bundle them
together and get that multi-domain isn't allowed error from gmail.Been using that for a while and haven't seen a single rejection or error
dealing with them. Also works well for the idiots at protection.outlook.com
because they randomly set max nrcpts to 2.
sendmail SMTP_MAILER_MAXRCPTS 1
define(`SMTP_MAILER_MAXRCPTS', `1')dnl
SMTP_MAILER_MAXRCPTS [undefined] If defined, the maximum number of
recipients to deliver in a single envelope for the
smtp, smtp8, esmtp, or dsmtp mailers.cf の Msmtp Mesmtp Msmtp8 Mdsmtp Mrelayが
Msmtp, P=[IPC], F=mDFMuX, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990, T=DNS/RFC822/SMTP, A=TCP $h ↓ Msmtp, P=[IPC], F=mDFMuX, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990, r=1, T=DNS/RFC822/SMTP, A=TCP $h
になる。
SMTP_MAILER_MAXRCPTS translates into "r" mailer field
The field has been added in sendmail-8.12.0
If, however, you are those that directly edit the .cf instead of the .mc then you’ll have to do the following
In you .cf find the following text (“Msmtp,” , “Mesmtp,” , “Mdsmtp, “, “Mrelay,”) After that find the following line(s)
T=DNS/RFC822/SMTP, And change it to look like this
email - Multiple destination domains per transaction is unsupported - Stack Overflow
https://copyprogramming.com/howto/multiple-destination-domains-per-transaction-is-unsupported
は stackoverflow.com のコピー？
sendmail gmail Multiple destination domains per transaction is unsupported - external storage 1 2019
※RELAY_MAILER_MAXRCPTS は設定してもcfに変更なし (sendmail 8.17.2) → 不要？
sendmail QUEUE_GROUP r=1
I'm reluctant to break a fundamental optimization in email delivery to
work around google's behavior. Although perhaps on today's
infrastructure it wouldn't really make all that much of difference.https://groups.google.com/g/comp.mail.sendmail/c/hAXDLGJPeM4
SMTP_MAILER_MAXRCPTS ではなく QUEUE_GROUP で対処する
local.domain.com.mc QUEUE_GROUP(`local', `P=/var/spool/mqueue/local')dnl QUEUE_GROUP(`remote', `P=/var/spool/mqueue/remote, r=1')dnl LOCAL_RULESETS Squeuegroup R$* @ local.domain $# local R$* @ $* $# remote mkdir /var/spool/mqueue/local mkdir /var/spool/mqueue/remote $ mailq /var/spool/mqueue is empty /var/spool/mqueue/local is empty /var/spool/mqueue/remote is empty Total requests: 0 /var/log/maillog 41D2uAov090715: split: maxrcpts=1, rcpts=3, count=2, ids=41D2uAow090715; 41D2uAox090715 41D2uAou090715: split: count=1, id=41D2uAov090715
@local.domain 以外はr=1
