bug #33707 [Mailer] ensure legacy event dispatcher compatibility (xabbuh)
bug #33707 [Mailer] ensure legacy event dispatcher compatibility (xabbuh)

This PR was merged into the 4.4 branch.

Discussion
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[Mailer] ensure legacy event dispatcher compatibility

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Commits
-------

860688ff2e ensure legacy event dispatcher compatibility

romaricdrigon/symfony,ragboyjr/symfony,Simperfit/symfony,Slamdunk/symfony,derrabus/symfony,tgalopin/symfony,jakzal/symfony,ogizanagi/symfony,tucksaun/symfony,oleg-andreyev/symfony,mpdude/symfony,smatyas/symfony,nicolas-grekas/symfony,Deamon/symfony,Slamdunk/symfony,Koc/symfony,gonzalovilaseca/symfony,shieldo/symfony,Taluu/symfony,stof/symfony,gonzalovilaseca/symfony,localheinz/symfony,phramz/symfony,lyrixx/symfony,curry684/symfony,fabpot/symfony,kbond/symfony,Koc/symfony,romaricdrigon/symfony,Deamon/symfony,stof/symfony,Taluu/symfony,damienalexandre/symfony,bendavies/symfony,MatTheCat/symfony,pyrech/symfony,pierredup/symfony,ogizanagi/symfony,sgehrig/symfony,pierredup/symfony,localheinz/symfony,lyrixx/symfony,Tobion/symfony,mnapoli/symfony,xabbuh/symfony,kbond/symfony,OskarStark/symfony,curry684/symfony,maidmaid/symfony,Deamon/symfony,chalasr/symfony,chalasr/symfony,hhamon/symfony,ro0NL/symfony,maidmaid/symfony,hhamon/symfony,gonzalovilaseca/symfony,jvasseur/symfony,shieldo/symfony,Slamdunk/symfony,paradajozsef/symfony,tucksaun/symfony,dmaicher/symfony,docteurklein/symfony,xabbuh/symfony,damienalexandre/symfony,voronkovich/symfony,xabbuh/symfony,dmaicher/symfony,garak/symfony,mnapoli/symfony,mpdude/symfony,dmaicher/symfony,HeahDude/symfony,fabpot/symfony,mnapoli/symfony,symfony/symfony,localheinz/symfony,localheinz/symfony,ogizanagi/symfony,sgehrig/symfony,zorn-v/symfony,sgehrig/symfony,jderusse/symfony,hhamon/symfony,docteurklein/symfony,Taluu/symfony,Simperfit/symfony,jderusse/symfony,smatyas/symfony,Nyholm/symfony,Simperfit/symfony,pyrech/symfony,jvasseur/symfony,curry684/symfony,fabpot/symfony,jderusse/symfony,zcodes/symfony,Tobion/symfony,symfony/symfony,jvasseur/symfony,bendavies/symfony,maidmaid/symfony,ro0NL/symfony,ogizanagi/symfony,tgalopin/symfony,mweimerskirch/symfony,phramz/symfony,Deamon/symfony,lstrojny/symfony,smatyas/symfony,mnapoli/symfony,stof/symfony,ro0NL/symfony,d-ph/symfony,mweimerskirch/symfony,docteurklein/symfony,paradajozsef/symfony,fabpot/symfony,Nyholm/symfony,mweimerskirch/symfony,jderusse/symfony,nicolas-grekas/symfony,chalasr/symfony,phramz/symfony,jakzal/symfony,jakzal/symfony,mweimerskirch/symfony,derrabus/symfony,docteurklein/symfony,curry684/symfony,mweimerskirch/symfony,symfony/symfony,OskarStark/symfony,lstrojny/symfony,alekitto/symfony,MatTheCat/symfony,alekitto/symfony,pyrech/symfony,oleg-andreyev/symfony,tgalopin/symfony,bendavies/symfony,Simperfit/symfony,sgehrig/symfony,damienalexandre/symfony,symfony/symfony,HeahDude/symfony,Slamdunk/symfony,d-ph/symfony,Tobion/symfony,zcodes/symfony,derrabus/symfony,1ed/symfony,ragboyjr/symfony,alekitto/symfony,lstrojny/symfony,HeahDude/symfony,voronkovich/symfony,zerkms/symfony,zorn-v/symfony,d-ph/symfony,garak/symfony,MatTheCat/symfony,ragboyjr/symfony,oleg-andreyev/symfony,pyrech/symfony,shieldo/symfony,zcodes/symfony,jvasseur/symfony,mpdude/symfony,romaricdrigon/symfony,paradajozsef/symfony,kbond/symfony,zorn-v/symfony,lyrixx/symfony,garak/symfony,ragboyjr/symfony,jakzal/symfony,Taluu/symfony,zcodes/symfony,mnapoli/symfony,MatTheCat/symfony,dmaicher/symfony,1ed/symfony,1ed/symfony,oleg-andreyev/symfony,tgalopin/symfony,xabbuh/symfony,kbond/symfony,nicolas-grekas/symfony,voronkovich/symfony,Koc/symfony,Nyholm/symfony,smatyas/symfony,Tobion/symfony,garak/symfony,OskarStark/symfony,Deamon/symfony,ro0NL/symfony,zerkms/symfony,paradajozsef/symfony,tucksaun/symfony,Koc/symfony,tucksaun/symfony,damienalexandre/symfony,OskarStark/symfony,smatyas/symfony,pierredup/symfony,d-ph/symfony,voronkovich/symfony,HeahDude/symfony,chalasr/symfony,Nyholm/symfony,shieldo/symfony,alekitto/symfony,romaricdrigon/symfony,zerkms/symfony,pierredup/symfony,mpdude/symfony,1ed/symfony,bendavies/symfony,zerkms/symfony,derrabus/symfony,hhamon/symfony,phramz/symfony,zorn-v/symfony,Simperfit/symfony,docteurklein/symfony,maidmaid/symfony,stof/symfony,gonzalovilaseca/symfony,lyrixx/symfony,nicolas-grekas/symfony